{
  "name": "Thermocouple type letter to alloy pair, ANSI/IEC color code and tolerance class",
  "description": "A thermocouple's type letter (J, K, T, E, N, R, S, B, C...) names an alloy pair, but the wire color that identifies it on the bench is set by a different standards body depending on where the part was made or bought \u2014 ANSI/ASTM MC96.1 uses one color code, IEC 60584-3 (and JIS C 1602 in Japan) uses a different one for the same alloy pair, and the two schemes disagree on which color means positive. Nobody publishes the type letter, both color codes, the alloy pair and the accuracy tolerance class on one page; a buyer or field technician instead has to hold two vendor charts side by side and hope the type letters line up. A record here is one thermocouple type with its positive/negative alloy names, ANSI positive/negative wire color, IEC positive/negative wire color, usable temperature range, and its ASTM E230 standard/special-limits tolerance alongside its IEC 60584-2 / JIS C 1602 class 1/2/3 tolerance. Answers 'is red positive or negative on a type K thermocouple', 'what color is IEC type J versus ANSI type J', 'what's the accuracy tolerance on a class 2 type N thermocouple', and 'my probe has a yellow and red wire, what type is it and is that ANSI or IEC'.",
  "url": "https://referencesource.org/thermocouple-type-color-code-crosswalk/",
  "licence": "The alloy pairs, wire colors and tolerance values are the content of published standards (ASTM E230/E230M, ANSI MC96.1, IEC 60584-2/-3, JIS C 1602) which are themselves sold documents; the facts within them are not copyrightable and every vendor reference chart already republishes them for exactly this reason. Each record quotes a short verbatim span from the vendor's own reproduction and links back to it, rather than reproducing or selling the standard itself.",
  "last_verified": "2026-08-19",
  "stale_after": "2028-08-18",
  "sources": [
    "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
    "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
    "https://thermometricscorp.com/thermocouple-color-codes.html",
    "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html"
  ],
  "records": [
    {
      "thermocouple_type": "B",
      "positive_conductor": "Platinum 30% rhodium",
      "negative_conductor": "Platinum 6% rhodium",
      "ansi_positive_color": "Gray",
      "ansi_negative_color": "Red",
      "ansi_extension_jacket": "Gray",
      "citation": "ANSI/ASTM Thermocouple Color Codes",
      "id": "b",
      "url": "https://referencesource.org/thermocouple-type-color-code-crosswalk/b/",
      "source": "https://thermometricscorp.com/thermocouple-color-codes.html",
      "source_quote": "Type | Positive conductor | Negative conductor | Positive color | Negative color | Extension-grade jacket | Thermocouple-grade jacket shown in legacy assets | T | Copper | Constantan | Blue | Red | Blue | Brown | J | Iron | Constantan | White | Red | Black | Brown | E | Chromel | Constantan | Purple | Red | Purple | Brown | K | Chromel | Alumel | Yellow | Red | Yellow | Brown | N | Nicrosil | Nisil | Orange | Red | Orange | Brown | S | Platinum 10% rhodium | Pure platinum | Black | Red | Green | None established in legacy asset | R | Platinum 13% rhodium | Pure platinum | Black | Red | Green | None established in legacy asset | B | Platinum 30% rhodium | Platinum 6% rhodium | Gray | Red | Gray | None established in legacy asset |",
      "verified_fields": [
        "ansi_extension_jacket",
        "ansi_negative_color",
        "ansi_positive_color",
        "citation",
        "negative_conductor",
        "positive_conductor",
        "thermocouple_type"
      ],
      "also_reported": [
        {
          "field": "temperature_range",
          "value": "0 to 1820\u00b0C",
          "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
          "source_quote": "B B Do Not Insert in Metal NONE \u2013 PLATINUM- Platinum- Tubes. Beware of \u2013 \u2013 Contamination. 0 to 1820\u00b0C 0 to 13.820 ESTABLISHED 30% RHODIUM 6% RHODIUM High Temp. Common Use 32 to 3308\u00b0F Pt-30% Rh Pt-6% Rh in Glass Industry",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_positive_color",
          "value": "Grey",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type B Thermocouple? In the UK and Europe, the most widely used colour code for Type B thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Grey, Negative Leg = White, Outer Sheath (Jacket) = Grey, Thermocouple Connector Colour = Grey",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_negative_color",
          "value": "White",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type B Thermocouple? In the UK and Europe, the most widely used colour code for Type B thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Grey, Negative Leg = White, Outer Sheath (Jacket) = Grey, Thermocouple Connector Colour = Grey",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_sheath_color",
          "value": "Grey",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type B Thermocouple? In the UK and Europe, the most widely used colour code for Type B thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Grey, Negative Leg = White, Outer Sheath (Jacket) = Grey, Thermocouple Connector Colour = Grey",
          "as_of": "2026-08-19"
        }
      ],
      "disagreements": [
        {
          "field": "citation",
          "versions": [
            {
              "value": "ANSI/ASTM Thermocouple Color Codes",
              "source": "https://thermometricscorp.com/thermocouple-color-codes.html",
              "source_quote": "Type | Positive conductor | Negative conductor | Positive color | Negative color | Extension-grade jacket | Thermocouple-grade jacket shown in legacy assets | T | Copper | Constantan | Blue | Red | Blue | Brown | J | Iron | Constantan | White | Red | Black | Brown | E | Chromel | Constantan | Purple | Red | Purple | Brown | K | Chromel | Alumel | Yellow | Red | Yellow | Brown | N | Nicrosil | Nisil | Orange | Red | Orange | Brown | S | Platinum 10% rhodium | Pure platinum | Black | Red | Green | None established in legacy asset | R | Platinum 13% rhodium | Pure platinum | Black | Red | Green | None established in legacy asset | B | Platinum 30% rhodium | Platinum 6% rhodium | Gray | Red | Gray | None established in legacy asset |",
              "as_of": "2026-08-19"
            },
            {
              "value": "ANSI and IEC Color Codes",
              "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
              "source_quote": "B B Do Not Insert in Metal NONE \u2013 PLATINUM- Platinum- Tubes. Beware of \u2013 \u2013 Contamination. 0 to 1820\u00b0C 0 to 13.820 ESTABLISHED 30% RHODIUM 6% RHODIUM High Temp. Common Use 32 to 3308\u00b0F Pt-30% Rh Pt-6% Rh in Glass Industry",
              "as_of": "2026-08-19"
            },
            {
              "value": "Thermocouple Colour Code Standards",
              "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
              "source_quote": "What is the Colour Code for a Type B Thermocouple? In the UK and Europe, the most widely used colour code for Type B thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Grey, Negative Leg = White, Outer Sheath (Jacket) = Grey, Thermocouple Connector Colour = Grey",
              "as_of": "2026-08-19"
            }
          ]
        }
      ]
    },
    {
      "thermocouple_type": "C",
      "positive_conductor": "Tungsten 5% rhenium",
      "negative_conductor": "Tungsten 26% rhenium",
      "ansi_positive_color": "Green",
      "ansi_negative_color": "Red",
      "ansi_extension_jacket": "Red",
      "citation": "ANSI/ASTM Thermocouple Color Codes",
      "id": "c",
      "url": "https://referencesource.org/thermocouple-type-color-code-crosswalk/c/",
      "source": "https://thermometricscorp.com/thermocouple-color-codes.html",
      "source_quote": "Type | Positive conductor | Negative conductor | Positive color | Negative color | Extension-grade jacket | Thermocouple-grade jacket shown in legacy assets | T | Copper | Constantan | Blue | Red | Blue | Brown | J | Iron | Constantan | White | Red | Black | Brown | E | Chromel | Constantan | Purple | Red | Purple | Brown | K | Chromel | Alumel | Yellow | Red | Yellow | Brown | N | Nicrosil | Nisil | Orange | Red | Orange | Brown | S | Platinum 10% rhodium | Pure platinum | Black | Red | Green | None established in legacy asset | R | Platinum 13% rhodium | Pure platinum | Black | Red | Green | None established in legacy asset | B | Platinum 30% rhodium | Platinum 6% rhodium | Gray | Red | Gray | None established in legacy asset | C | Tungsten 5% rhenium | Tungsten 26% rhenium | Green | Red | Red | Unjacketed conductors shown in legacy asset |",
      "verified_fields": [
        "ansi_extension_jacket",
        "ansi_negative_color",
        "ansi_positive_color",
        "citation",
        "negative_conductor",
        "positive_conductor",
        "thermocouple_type"
      ],
      "also_reported": [
        {
          "field": "temperature_range",
          "value": "0 to 2320\u00b0C",
          "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
          "source_quote": "C* C Vacuum, Inert, Hydrogen. NONE + TUNGSTEN- TUNGSTEN- Beware of Embrittlement. NO STANDARD \u2013 5% RHENIUM 26% RHENIUM Not Practical Below 0 to 2320\u00b0C USE ANSI ESTABLISHED 399\u00b0C (750\u00b0F) 32 to 4208\u00b0F 0 to 37.066 W-5% Re W-26% Re COLOR CODE (W5) Not for Oxidizing Atmosphere (W5)",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_positive_color",
          "value": "Red",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type C Thermocouple? In the UK and Europe, the official colour code for Type C thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Red * Negative Leg = White * Outer Sheath (Jacket) = Red",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_negative_color",
          "value": "White",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type C Thermocouple? In the UK and Europe, the official colour code for Type C thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Red * Negative Leg = White * Outer Sheath (Jacket) = Red",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_sheath_color",
          "value": "Red",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type C Thermocouple? In the UK and Europe, the official colour code for Type C thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Red * Negative Leg = White * Outer Sheath (Jacket) = Red",
          "as_of": "2026-08-19"
        }
      ],
      "disagreements": [
        {
          "field": "citation",
          "versions": [
            {
              "value": "ANSI/ASTM Thermocouple Color Codes",
              "source": "https://thermometricscorp.com/thermocouple-color-codes.html",
              "source_quote": "Type | Positive conductor | Negative conductor | Positive color | Negative color | Extension-grade jacket | Thermocouple-grade jacket shown in legacy assets | T | Copper | Constantan | Blue | Red | Blue | Brown | J | Iron | Constantan | White | Red | Black | Brown | E | Chromel | Constantan | Purple | Red | Purple | Brown | K | Chromel | Alumel | Yellow | Red | Yellow | Brown | N | Nicrosil | Nisil | Orange | Red | Orange | Brown | S | Platinum 10% rhodium | Pure platinum | Black | Red | Green | None established in legacy asset | R | Platinum 13% rhodium | Pure platinum | Black | Red | Green | None established in legacy asset | B | Platinum 30% rhodium | Platinum 6% rhodium | Gray | Red | Gray | None established in legacy asset | C | Tungsten 5% rhenium | Tungsten 26% rhenium | Green | Red | Red | Unjacketed conductors shown in legacy asset |",
              "as_of": "2026-08-19"
            },
            {
              "value": "ANSI and IEC Color Codes",
              "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
              "source_quote": "C* C Vacuum, Inert, Hydrogen. NONE + TUNGSTEN- TUNGSTEN- Beware of Embrittlement. NO STANDARD \u2013 5% RHENIUM 26% RHENIUM Not Practical Below 0 to 2320\u00b0C USE ANSI ESTABLISHED 399\u00b0C (750\u00b0F) 32 to 4208\u00b0F 0 to 37.066 W-5% Re W-26% Re COLOR CODE (W5) Not for Oxidizing Atmosphere (W5)",
              "as_of": "2026-08-19"
            },
            {
              "value": "Thermocouple Colour Code Standards",
              "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
              "source_quote": "What is the Colour Code for a Type C Thermocouple? In the UK and Europe, the official colour code for Type C thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Red * Negative Leg = White * Outer Sheath (Jacket) = Red",
              "as_of": "2026-08-19"
            }
          ]
        }
      ]
    },
    {
      "thermocouple_type": "D",
      "temperature_range": "0 to 2320\u00b0C",
      "citation": "ANSI and IEC Color Codes",
      "id": "d",
      "url": "https://referencesource.org/thermocouple-type-color-code-crosswalk/d/",
      "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
      "source_quote": "D* D Vacuum, Inert, Hydrogen. + TUNGSTEN- TUNGSTEN- Beware of Embrittlement. Not Practical Below NO STANDARD NONE 0 to 2320\u00b0C USE ANSI \u2013 3% RHENIUM 25% RHENIUM 399\u00b0C (750\u00b0F)\u2013Not for ESTABLISHED W-3% Re W-25% Re 32 to 4208\u00b0F 0 to 39.506 COLOR CODE (W3) Oxidizing Atmosphere (W3)",
      "verified_fields": [
        "citation",
        "temperature_range",
        "thermocouple_type"
      ]
    },
    {
      "thermocouple_type": "E",
      "positive_conductor": "Chromel",
      "negative_conductor": "Constantan",
      "ansi_positive_color": "Purple",
      "ansi_negative_color": "Red",
      "ansi_extension_jacket": "Purple",
      "citation": "ANSI/ASTM Thermocouple Color Codes",
      "id": "e",
      "url": "https://referencesource.org/thermocouple-type-color-code-crosswalk/e/",
      "source": "https://thermometricscorp.com/thermocouple-color-codes.html",
      "source_quote": "Type | Positive conductor | Negative conductor | Positive color | Negative color | Extension-grade jacket | Thermocouple-grade jacket shown in legacy assets | T | Copper | Constantan | Blue | Red | Blue | Brown | J | Iron | Constantan | White | Red | Black | Brown | E | Chromel | Constantan | Purple | Red | Purple | Brown |",
      "verified_fields": [
        "ansi_extension_jacket",
        "ansi_negative_color",
        "ansi_positive_color",
        "citation",
        "negative_conductor",
        "positive_conductor",
        "thermocouple_type"
      ],
      "also_reported": [
        {
          "field": "temperature_range",
          "value": "\u2013270 to 1000\u00b0C",
          "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
          "source_quote": "CHROMEGA\u00ae Oxidizing or Inert. + + E E CONSTANTAN Limited Use in Vacuum or \u2013270 to 1000\u00b0C \u20139.835 to \u2013 \u2013 NICKEL- COPPER- Reducing. Highest EMF \u2013454 to 1832\u00b0F 76.373 \u2013 \u2013 CHROMIUM NICKEL Change Ni-Cr Cu-Ni Per Degree",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_tolerance_class_1",
          "value": "\u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 800\u00b0C \u00b10.004\u22c5 |t|",
          "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
          "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t| | T | COPPER | COPPER - NICKEL Also known as: Constantan, Advance\u2122, Cupron\u2122 | 46 | \u2013 | \u2013 | \u2013185 to +300\u00b0C | \u2013250 to +400\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +125\u00b0C \u00b10.5\u00b0C 125\u00b0C to 350\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +133\u00b0C \u00b11.0\u00b0C 133\u00b0C to 350\u00b0C \u00b10.0075 \u22c5 |t| | J | IRON (magnetic) Also known as: Fe | COPPER - NICKEL Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 54 | 56 | 59 | +20 to +700\u00b0C | \u2013180 to +750\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 750\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 750\u00b0C \u00b10.0075 \u22c5 |t| | N | NICKEL - CHROMIUM -SILICON Also known as: Nicrosil | NICKEL - SILICON - MAGNESIUM Also known as: Nisil | 30 | 38 | 39 | 0 to +1150\u00baC | -270 to +1300\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075\u22c5 |t| | E | NICKEL - CHROMIUM Also known as: Chromel\u2122, Tophel\u2122, Chromium, Nickel | NICKEL - Aluminum Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 68 | 81 | \u2013 | 0 to +800\u00baC | -40 to +900\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 800\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 900\u00b0C \u00b10.0075 \u22c5 |t|",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_tolerance_class_2",
          "value": "\u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 900\u00b0C \u00b10.0075 \u22c5 |t|",
          "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
          "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t| | T | COPPER | COPPER - NICKEL Also known as: Constantan, Advance\u2122, Cupron\u2122 | 46 | \u2013 | \u2013 | \u2013185 to +300\u00b0C | \u2013250 to +400\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +125\u00b0C \u00b10.5\u00b0C 125\u00b0C to 350\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +133\u00b0C \u00b11.0\u00b0C 133\u00b0C to 350\u00b0C \u00b10.0075 \u22c5 |t| | J | IRON (magnetic) Also known as: Fe | COPPER - NICKEL Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 54 | 56 | 59 | +20 to +700\u00b0C | \u2013180 to +750\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 750\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 750\u00b0C \u00b10.0075 \u22c5 |t| | N | NICKEL - CHROMIUM -SILICON Also known as: Nicrosil | NICKEL - SILICON - MAGNESIUM Also known as: Nisil | 30 | 38 | 39 | 0 to +1150\u00baC | -270 to +1300\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075\u22c5 |t| | E | NICKEL - CHROMIUM Also known as: Chromel\u2122, Tophel\u2122, Chromium, Nickel | NICKEL - Aluminum Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 68 | 81 | \u2013 | 0 to +800\u00baC | -40 to +900\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 800\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 900\u00b0C \u00b10.0075 \u22c5 |t|",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_positive_color",
          "value": "Purple",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type E Thermocouple? In the UK and Europe, the most widely used colour code for Type E thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Purple, Negative Leg = White, Outer Sheath (Jacket) = Purple, Thermocouple Connector Colour = Purple",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_negative_color",
          "value": "White",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type E Thermocouple? In the UK and Europe, the most widely used colour code for Type E thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Purple, Negative Leg = White, Outer Sheath (Jacket) = Purple, Thermocouple Connector Colour = Purple",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_sheath_color",
          "value": "Purple",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type E Thermocouple? In the UK and Europe, the most widely used colour code for Type E thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Purple, Negative Leg = White, Outer Sheath (Jacket) = Purple, Thermocouple Connector Colour = Purple",
          "as_of": "2026-08-19"
        }
      ],
      "disagreements": [
        {
          "field": "citation",
          "versions": [
            {
              "value": "ANSI/ASTM Thermocouple Color Codes",
              "source": "https://thermometricscorp.com/thermocouple-color-codes.html",
              "source_quote": "Type | Positive conductor | Negative conductor | Positive color | Negative color | Extension-grade jacket | Thermocouple-grade jacket shown in legacy assets | T | Copper | Constantan | Blue | Red | Blue | Brown | J | Iron | Constantan | White | Red | Black | Brown | E | Chromel | Constantan | Purple | Red | Purple | Brown |",
              "as_of": "2026-08-19"
            },
            {
              "value": "ANSI and IEC Color Codes",
              "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
              "source_quote": "CHROMEGA\u00ae Oxidizing or Inert. + + E E CONSTANTAN Limited Use in Vacuum or \u2013270 to 1000\u00b0C \u20139.835 to \u2013 \u2013 NICKEL- COPPER- Reducing. Highest EMF \u2013454 to 1832\u00b0F 76.373 \u2013 \u2013 CHROMIUM NICKEL Change Ni-Cr Cu-Ni Per Degree",
              "as_of": "2026-08-19"
            },
            {
              "value": "Thermocouple Tolerances",
              "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
              "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t| | T | COPPER | COPPER - NICKEL Also known as: Constantan, Advance\u2122, Cupron\u2122 | 46 | \u2013 | \u2013 | \u2013185 to +300\u00b0C | \u2013250 to +400\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +125\u00b0C \u00b10.5\u00b0C 125\u00b0C to 350\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +133\u00b0C \u00b11.0\u00b0C 133\u00b0C to 350\u00b0C \u00b10.0075 \u22c5 |t| | J | IRON (magnetic) Also known as: Fe | COPPER - NICKEL Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 54 | 56 | 59 | +20 to +700\u00b0C | \u2013180 to +750\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 750\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 750\u00b0C \u00b10.0075 \u22c5 |t| | N | NICKEL - CHROMIUM -SILICON Also known as: Nicrosil | NICKEL - SILICON - MAGNESIUM Also known as: Nisil | 30 | 38 | 39 | 0 to +1150\u00baC | -270 to +1300\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075\u22c5 |t| | E | NICKEL - CHROMIUM Also known as: Chromel\u2122, Tophel\u2122, Chromium, Nickel | NICKEL - Aluminum Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 68 | 81 | \u2013 | 0 to +800\u00baC | -40 to +900\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 800\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 900\u00b0C \u00b10.0075 \u22c5 |t|",
              "as_of": "2026-08-19"
            },
            {
              "value": "Thermocouple Colour Code Standards",
              "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
              "source_quote": "What is the Colour Code for a Type E Thermocouple? In the UK and Europe, the most widely used colour code for Type E thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Purple, Negative Leg = White, Outer Sheath (Jacket) = Purple, Thermocouple Connector Colour = Purple",
              "as_of": "2026-08-19"
            }
          ]
        }
      ]
    },
    {
      "thermocouple_type": "G",
      "temperature_range": "0 to 2320\u00b0C",
      "citation": "ANSI and IEC Color Codes",
      "id": "g",
      "url": "https://referencesource.org/thermocouple-type-color-code-crosswalk/g/",
      "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
      "source_quote": "G* Vacuum, Inert, Hydrogen. NONE ESTABLISHED + \u2013 TUNGSTEN W TUNGSTEN- 26% RHENIUM Beware of Embrittlement. Not Practical Below 399\u00b0C (750\u00b0F). 0 to 2320\u00b0C 0 to 38.564 NO STANDARD USE ANSI COLOR CODE G (W) W-26% Re Not for Oxidizing Atmosphere 32 to 4208\u00b0F (W)",
      "verified_fields": [
        "citation",
        "temperature_range",
        "thermocouple_type"
      ]
    },
    {
      "thermocouple_type": "J",
      "positive_conductor": "Iron",
      "negative_conductor": "Constantan",
      "ansi_positive_color": "White",
      "ansi_negative_color": "Red",
      "ansi_extension_jacket": "Black",
      "citation": "ANSI/ASTM Thermocouple Color Codes",
      "id": "j",
      "url": "https://referencesource.org/thermocouple-type-color-code-crosswalk/j/",
      "source": "https://thermometricscorp.com/thermocouple-color-codes.html",
      "source_quote": "Type | Positive conductor | Negative conductor | Positive color | Negative color | Extension-grade jacket | Thermocouple-grade jacket shown in legacy assets | T | Copper | Constantan | Blue | Red | Blue | Brown | J | Iron | Constantan | White | Red | Black | Brown |",
      "verified_fields": [
        "ansi_extension_jacket",
        "ansi_negative_color",
        "ansi_positive_color",
        "citation",
        "negative_conductor",
        "positive_conductor",
        "thermocouple_type"
      ],
      "also_reported": [
        {
          "field": "temperature_range",
          "value": "\u2013210 to 1200\u00b0C",
          "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
          "source_quote": "J J IRON CONSTANTAN \u2013 Fe COPPER- in Oxidizing at High \u2013 \u2013 Temperatures. \u2013210 to 1200\u00b0C \u20138.095 to \u2013 (magnetic) NICKEL Not Recommended for \u2013346 to 2193\u00b0F 69.553 Cu-Ni Low Temperatures.",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_tolerance_class_1",
          "value": "\u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 750\u00b0C \u00b10.004\u22c5 |t|",
          "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
          "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t| | T | COPPER | COPPER - NICKEL Also known as: Constantan, Advance\u2122, Cupron\u2122 | 46 | \u2013 | \u2013 | \u2013185 to +300\u00b0C | \u2013250 to +400\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +125\u00b0C \u00b10.5\u00b0C 125\u00b0C to 350\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +133\u00b0C \u00b11.0\u00b0C 133\u00b0C to 350\u00b0C \u00b10.0075 \u22c5 |t| | J | IRON (magnetic) Also known as: Fe | COPPER - NICKEL Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 54 | 56 | 59 | +20 to +700\u00b0C | \u2013180 to +750\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 750\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 750\u00b0C \u00b10.0075 \u22c5 |t|",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_tolerance_class_2",
          "value": "\u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 750\u00b0C \u00b10.0075 \u22c5 |t|",
          "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
          "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t| | T | COPPER | COPPER - NICKEL Also known as: Constantan, Advance\u2122, Cupron\u2122 | 46 | \u2013 | \u2013 | \u2013185 to +300\u00b0C | \u2013250 to +400\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +125\u00b0C \u00b10.5\u00b0C 125\u00b0C to 350\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +133\u00b0C \u00b11.0\u00b0C 133\u00b0C to 350\u00b0C \u00b10.0075 \u22c5 |t| | J | IRON (magnetic) Also known as: Fe | COPPER - NICKEL Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 54 | 56 | 59 | +20 to +700\u00b0C | \u2013180 to +750\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 750\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 750\u00b0C \u00b10.0075 \u22c5 |t|",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_positive_color",
          "value": "Black",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type J Thermocouple? In the UK and Europe, the most widely used colour code for Type J thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Black, Negative Leg = White, Outer Sheath (Jacket) = Black, Thermocouple Connector Colour = Black",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_negative_color",
          "value": "White",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type J Thermocouple? In the UK and Europe, the most widely used colour code for Type J thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Black, Negative Leg = White, Outer Sheath (Jacket) = Black, Thermocouple Connector Colour = Black",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_sheath_color",
          "value": "Black",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type J Thermocouple? In the UK and Europe, the most widely used colour code for Type J thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Black, Negative Leg = White, Outer Sheath (Jacket) = Black, Thermocouple Connector Colour = Black",
          "as_of": "2026-08-19"
        }
      ],
      "disagreements": [
        {
          "field": "citation",
          "versions": [
            {
              "value": "ANSI/ASTM Thermocouple Color Codes",
              "source": "https://thermometricscorp.com/thermocouple-color-codes.html",
              "source_quote": "Type | Positive conductor | Negative conductor | Positive color | Negative color | Extension-grade jacket | Thermocouple-grade jacket shown in legacy assets | T | Copper | Constantan | Blue | Red | Blue | Brown | J | Iron | Constantan | White | Red | Black | Brown |",
              "as_of": "2026-08-19"
            },
            {
              "value": "ANSI and IEC Color Codes",
              "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
              "source_quote": "J J IRON CONSTANTAN \u2013 Fe COPPER- in Oxidizing at High \u2013 \u2013 Temperatures. \u2013210 to 1200\u00b0C \u20138.095 to \u2013 (magnetic) NICKEL Not Recommended for \u2013346 to 2193\u00b0F 69.553 Cu-Ni Low Temperatures.",
              "as_of": "2026-08-19"
            },
            {
              "value": "Thermocouple Tolerances",
              "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
              "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t| | T | COPPER | COPPER - NICKEL Also known as: Constantan, Advance\u2122, Cupron\u2122 | 46 | \u2013 | \u2013 | \u2013185 to +300\u00b0C | \u2013250 to +400\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +125\u00b0C \u00b10.5\u00b0C 125\u00b0C to 350\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +133\u00b0C \u00b11.0\u00b0C 133\u00b0C to 350\u00b0C \u00b10.0075 \u22c5 |t| | J | IRON (magnetic) Also known as: Fe | COPPER - NICKEL Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 54 | 56 | 59 | +20 to +700\u00b0C | \u2013180 to +750\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 750\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 750\u00b0C \u00b10.0075 \u22c5 |t|",
              "as_of": "2026-08-19"
            },
            {
              "value": "Thermocouple Colour Code Standards",
              "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
              "source_quote": "What is the Colour Code for a Type J Thermocouple? In the UK and Europe, the most widely used colour code for Type J thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Black, Negative Leg = White, Outer Sheath (Jacket) = Black, Thermocouple Connector Colour = Black",
              "as_of": "2026-08-19"
            }
          ]
        }
      ]
    },
    {
      "thermocouple_type": "K",
      "positive_conductor": "Chromel",
      "negative_conductor": "Alumel",
      "ansi_positive_color": "Yellow",
      "ansi_negative_color": "Red",
      "ansi_extension_jacket": "Yellow",
      "citation": "ANSI/ASTM Thermocouple Color Codes",
      "id": "k",
      "url": "https://referencesource.org/thermocouple-type-color-code-crosswalk/k/",
      "source": "https://thermometricscorp.com/thermocouple-color-codes.html",
      "source_quote": "Type | Positive conductor | Negative conductor | Positive color | Negative color | Extension-grade jacket | Thermocouple-grade jacket shown in legacy assets | T | Copper | Constantan | Blue | Red | Blue | Brown | J | Iron | Constantan | White | Red | Black | Brown | E | Chromel | Constantan | Purple | Red | Purple | Brown | K | Chromel | Alumel | Yellow | Red | Yellow | Brown |",
      "verified_fields": [
        "ansi_extension_jacket",
        "ansi_negative_color",
        "ansi_positive_color",
        "citation",
        "negative_conductor",
        "positive_conductor",
        "thermocouple_type"
      ],
      "also_reported": [
        {
          "field": "temperature_range",
          "value": "\u2013270 to 1372\u00b0C",
          "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
          "source_quote": "ALOMEGA \u00ae Clean Oxidizing and Inert. + + CHROMEGA \u00ae + + K K Limited Use in Vacuum NICKEL- NICKEL- \u2013 \u2013 ALUMINUM or Reducing. Wide \u2013270 to 1372\u00b0C \u20136.458 to \u2013 \u2013 CHROMIUM Temperature Ni-AI Range, Most Popular \u2013454 to 2501\u00b0F 54.886 Ni-Cr (magnetic) H Calibration",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_tolerance_class_1",
          "value": "\u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t|",
          "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
          "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t|",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_tolerance_class_2",
          "value": "\u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t|",
          "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
          "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t|",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_positive_color",
          "value": "Green",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type K Thermocouple? In the UK and Europe, the most widely used colour code for Type K thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Green, Negative Leg = White, Outer Sheath (Jacket) = Green, Thermocouple Connector Colour = Green",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_negative_color",
          "value": "White",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type K Thermocouple? In the UK and Europe, the most widely used colour code for Type K thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Green, Negative Leg = White, Outer Sheath (Jacket) = Green, Thermocouple Connector Colour = Green",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_sheath_color",
          "value": "Green",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type K Thermocouple? In the UK and Europe, the most widely used colour code for Type K thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Green, Negative Leg = White, Outer Sheath (Jacket) = Green, Thermocouple Connector Colour = Green",
          "as_of": "2026-08-19"
        }
      ],
      "disagreements": [
        {
          "field": "citation",
          "versions": [
            {
              "value": "ANSI/ASTM Thermocouple Color Codes",
              "source": "https://thermometricscorp.com/thermocouple-color-codes.html",
              "source_quote": "Type | Positive conductor | Negative conductor | Positive color | Negative color | Extension-grade jacket | Thermocouple-grade jacket shown in legacy assets | T | Copper | Constantan | Blue | Red | Blue | Brown | J | Iron | Constantan | White | Red | Black | Brown | E | Chromel | Constantan | Purple | Red | Purple | Brown | K | Chromel | Alumel | Yellow | Red | Yellow | Brown |",
              "as_of": "2026-08-19"
            },
            {
              "value": "ANSI and IEC Color Codes",
              "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
              "source_quote": "ALOMEGA \u00ae Clean Oxidizing and Inert. + + CHROMEGA \u00ae + + K K Limited Use in Vacuum NICKEL- NICKEL- \u2013 \u2013 ALUMINUM or Reducing. Wide \u2013270 to 1372\u00b0C \u20136.458 to \u2013 \u2013 CHROMIUM Temperature Ni-AI Range, Most Popular \u2013454 to 2501\u00b0F 54.886 Ni-Cr (magnetic) H Calibration",
              "as_of": "2026-08-19"
            },
            {
              "value": "Thermocouple Tolerances",
              "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
              "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t|",
              "as_of": "2026-08-19"
            },
            {
              "value": "Thermocouple Colour Code Standards",
              "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
              "source_quote": "What is the Colour Code for a Type K Thermocouple? In the UK and Europe, the most widely used colour code for Type K thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Green, Negative Leg = White, Outer Sheath (Jacket) = Green, Thermocouple Connector Colour = Green",
              "as_of": "2026-08-19"
            }
          ]
        }
      ]
    },
    {
      "thermocouple_type": "N",
      "positive_conductor": "Nicrosil",
      "negative_conductor": "Nisil",
      "ansi_positive_color": "Orange",
      "ansi_negative_color": "Red",
      "ansi_extension_jacket": "Orange",
      "citation": "ANSI/ASTM Thermocouple Color Codes",
      "id": "n",
      "url": "https://referencesource.org/thermocouple-type-color-code-crosswalk/n/",
      "source": "https://thermometricscorp.com/thermocouple-color-codes.html",
      "source_quote": "Type | Positive conductor | Negative conductor | Positive color | Negative color | Extension-grade jacket | Thermocouple-grade jacket shown in legacy assets | T | Copper | Constantan | Blue | Red | Blue | Brown | J | Iron | Constantan | White | Red | Black | Brown | E | Chromel | Constantan | Purple | Red | Purple | Brown | K | Chromel | Alumel | Yellow | Red | Yellow | Brown | N | Nicrosil | Nisil | Orange | Red | Orange | Brown |",
      "verified_fields": [
        "ansi_extension_jacket",
        "ansi_negative_color",
        "ansi_positive_color",
        "citation",
        "negative_conductor",
        "positive_conductor",
        "thermocouple_type"
      ],
      "also_reported": [
        {
          "field": "temperature_range",
          "value": "\u2013270 to 1300\u00b0C",
          "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
          "source_quote": "Alternative + + N N OMEGA-P\u00ae OMEGA-N\u00ae to Type K. \u2013270 to 1300\u00b0C \u20134.345 \u2013 \u2013 NICROSIL \u2013 \u2013 NISIL More Stable \u2013450 to 2372\u00b0F to 47.513 Ni-Cr-Si Ni-Si-Mg at High Temps",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_tolerance_class_1",
          "value": "\u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004\u22c5 |t|",
          "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
          "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t| | T | COPPER | COPPER - NICKEL Also known as: Constantan, Advance\u2122, Cupron\u2122 | 46 | \u2013 | \u2013 | \u2013185 to +300\u00b0C | \u2013250 to +400\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +125\u00b0C \u00b10.5\u00b0C 125\u00b0C to 350\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +133\u00b0C \u00b11.0\u00b0C 133\u00b0C to 350\u00b0C \u00b10.0075 \u22c5 |t| | J | IRON (magnetic) Also known as: Fe | COPPER - NICKEL Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 54 | 56 | 59 | +20 to +700\u00b0C | \u2013180 to +750\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 750\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 750\u00b0C \u00b10.0075 \u22c5 |t| | N | NICKEL - CHROMIUM -SILICON Also known as: Nicrosil | NICKEL - SILICON - MAGNESIUM Also known as: Nisil | 30 | 38 | 39 | 0 to +1150\u00baC | -270 to +1300\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075\u22c5 |t|",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_tolerance_class_2",
          "value": "\u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075\u22c5 |t|",
          "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
          "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t| | T | COPPER | COPPER - NICKEL Also known as: Constantan, Advance\u2122, Cupron\u2122 | 46 | \u2013 | \u2013 | \u2013185 to +300\u00b0C | \u2013250 to +400\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +125\u00b0C \u00b10.5\u00b0C 125\u00b0C to 350\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +133\u00b0C \u00b11.0\u00b0C 133\u00b0C to 350\u00b0C \u00b10.0075 \u22c5 |t| | J | IRON (magnetic) Also known as: Fe | COPPER - NICKEL Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 54 | 56 | 59 | +20 to +700\u00b0C | \u2013180 to +750\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 750\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 750\u00b0C \u00b10.0075 \u22c5 |t| | N | NICKEL - CHROMIUM -SILICON Also known as: Nicrosil | NICKEL - SILICON - MAGNESIUM Also known as: Nisil | 30 | 38 | 39 | 0 to +1150\u00baC | -270 to +1300\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075\u22c5 |t|",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_positive_color",
          "value": "Pink",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type N Thermocouple? In the UK and Europe, the most widely used colour code for Type N thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Pink, Negative Leg = White, Outer Sheath (Jacket) = Pink, Thermocouple Connector Colour = Pink",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_negative_color",
          "value": "White",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type N Thermocouple? In the UK and Europe, the most widely used colour code for Type N thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Pink, Negative Leg = White, Outer Sheath (Jacket) = Pink, Thermocouple Connector Colour = Pink",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_sheath_color",
          "value": "Pink",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type N Thermocouple? In the UK and Europe, the most widely used colour code for Type N thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Pink, Negative Leg = White, Outer Sheath (Jacket) = Pink, Thermocouple Connector Colour = Pink",
          "as_of": "2026-08-19"
        }
      ],
      "disagreements": [
        {
          "field": "citation",
          "versions": [
            {
              "value": "ANSI/ASTM Thermocouple Color Codes",
              "source": "https://thermometricscorp.com/thermocouple-color-codes.html",
              "source_quote": "Type | Positive conductor | Negative conductor | Positive color | Negative color | Extension-grade jacket | Thermocouple-grade jacket shown in legacy assets | T | Copper | Constantan | Blue | Red | Blue | Brown | J | Iron | Constantan | White | Red | Black | Brown | E | Chromel | Constantan | Purple | Red | Purple | Brown | K | Chromel | Alumel | Yellow | Red | Yellow | Brown | N | Nicrosil | Nisil | Orange | Red | Orange | Brown |",
              "as_of": "2026-08-19"
            },
            {
              "value": "ANSI and IEC Color Codes",
              "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
              "source_quote": "Alternative + + N N OMEGA-P\u00ae OMEGA-N\u00ae to Type K. \u2013270 to 1300\u00b0C \u20134.345 \u2013 \u2013 NICROSIL \u2013 \u2013 NISIL More Stable \u2013450 to 2372\u00b0F to 47.513 Ni-Cr-Si Ni-Si-Mg at High Temps",
              "as_of": "2026-08-19"
            },
            {
              "value": "Thermocouple Tolerances",
              "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
              "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t| | T | COPPER | COPPER - NICKEL Also known as: Constantan, Advance\u2122, Cupron\u2122 | 46 | \u2013 | \u2013 | \u2013185 to +300\u00b0C | \u2013250 to +400\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +125\u00b0C \u00b10.5\u00b0C 125\u00b0C to 350\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +133\u00b0C \u00b11.0\u00b0C 133\u00b0C to 350\u00b0C \u00b10.0075 \u22c5 |t| | J | IRON (magnetic) Also known as: Fe | COPPER - NICKEL Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 54 | 56 | 59 | +20 to +700\u00b0C | \u2013180 to +750\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 750\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 750\u00b0C \u00b10.0075 \u22c5 |t| | N | NICKEL - CHROMIUM -SILICON Also known as: Nicrosil | NICKEL - SILICON - MAGNESIUM Also known as: Nisil | 30 | 38 | 39 | 0 to +1150\u00baC | -270 to +1300\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075\u22c5 |t|",
              "as_of": "2026-08-19"
            },
            {
              "value": "Thermocouple Colour Code Standards",
              "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
              "source_quote": "What is the Colour Code for a Type N Thermocouple? In the UK and Europe, the most widely used colour code for Type N thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Pink, Negative Leg = White, Outer Sheath (Jacket) = Pink, Thermocouple Connector Colour = Pink",
              "as_of": "2026-08-19"
            }
          ]
        }
      ]
    },
    {
      "thermocouple_type": "R",
      "positive_conductor": "Platinum 13% rhodium",
      "negative_conductor": "Pure platinum",
      "ansi_positive_color": "Black",
      "ansi_negative_color": "Red",
      "ansi_extension_jacket": "Green",
      "citation": "ANSI/ASTM Thermocouple Color Codes",
      "id": "r",
      "url": "https://referencesource.org/thermocouple-type-color-code-crosswalk/r/",
      "source": "https://thermometricscorp.com/thermocouple-color-codes.html",
      "source_quote": "Type | Positive conductor | Negative conductor | Positive color | Negative color | Extension-grade jacket | Thermocouple-grade jacket shown in legacy assets | T | Copper | Constantan | Blue | Red | Blue | Brown | J | Iron | Constantan | White | Red | Black | Brown | E | Chromel | Constantan | Purple | Red | Purple | Brown | K | Chromel | Alumel | Yellow | Red | Yellow | Brown | N | Nicrosil | Nisil | Orange | Red | Orange | Brown | S | Platinum 10% rhodium | Pure platinum | Black | Red | Green | None established in legacy asset | R | Platinum 13% rhodium | Pure platinum | Black | Red | Green | None established in legacy asset |",
      "verified_fields": [
        "ansi_extension_jacket",
        "ansi_negative_color",
        "ansi_positive_color",
        "citation",
        "negative_conductor",
        "positive_conductor",
        "thermocouple_type"
      ],
      "also_reported": [
        {
          "field": "temperature_range",
          "value": "\u201350 to 1768\u00b0C",
          "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
          "source_quote": "R R Do Not Insert in Metal NONE PLATINUM- Platinum Tubes. Beware of \u201350 to 1768\u00b0C \u20130.226 \u2013 \u2013 \u2013 13% RHODIUM Pt Contamination. ESTABLISHED High Temperature \u201358 to 3214\u00b0F to 21.101 Pt-13% Rh",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_tolerance_class_1",
          "value": "0\u00b0C to +1100\u00b0C \u00b11.0\u00b0C 1100\u00b0C to 1600\u00b0C \u00b1(1 +0.003 (t \u22c5 1100)\u00b0C",
          "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
          "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t| | T | COPPER | COPPER - NICKEL Also known as: Constantan, Advance\u2122, Cupron\u2122 | 46 | \u2013 | \u2013 | \u2013185 to +300\u00b0C | \u2013250 to +400\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +125\u00b0C \u00b10.5\u00b0C 125\u00b0C to 350\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +133\u00b0C \u00b11.0\u00b0C 133\u00b0C to 350\u00b0C \u00b10.0075 \u22c5 |t| | J | IRON (magnetic) Also known as: Fe | COPPER - NICKEL Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 54 | 56 | 59 | +20 to +700\u00b0C | \u2013180 to +750\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 750\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 750\u00b0C \u00b10.0075 \u22c5 |t| | N | NICKEL - CHROMIUM -SILICON Also known as: Nicrosil | NICKEL - SILICON - MAGNESIUM Also known as: Nisil | 30 | 38 | 39 | 0 to +1150\u00baC | -270 to +1300\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075\u22c5 |t| | E | NICKEL - CHROMIUM Also known as: Chromel\u2122, Tophel\u2122, Chromium, Nickel | NICKEL - Aluminum Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 68 | 81 | \u2013 | 0 to +800\u00baC | -40 to +900\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 800\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 900\u00b0C \u00b10.0075 \u22c5 |t| | S | PLATINUM - 10% RHODIUM | PLATINUM | 8 | 9 | 11 | 0 to +1550\u00baC | -50 to +1750\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | 0\u00b0C to +1100\u00b0C \u00b11.0\u00b0C 1100\u00b0C to 1600\u00b0C \u00b1(1 +0.003 (t \u22c5 1100)\u00b0C | 0\u00b0C to +600\u00b0C \u00b11.5\u00b0C 600\u00b0C to 1600\u00b0C \u00b10.0025 \u22c5 |t| | R | PLATINUM - 13% RHODIUM | PLATINUM | 8 | 10 | 13 | 0 to +1600\u00baC | -50 to +1700\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | 0\u00b0C to +1100\u00b0C \u00b11.0\u00b0C 1100\u00b0C to 1600\u00b0C \u00b1(1 +0.003 (t \u22c5 1100)\u00b0C | 0\u00b0C to +600\u00b0C \u00b11.5\u00b0C 600\u00b0C to 1600\u00b0C \u00b10.0025 \u22c5 |t|",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_tolerance_class_2",
          "value": "0\u00b0C to +600\u00b0C \u00b11.5\u00b0C 600\u00b0C to 1600\u00b0C \u00b10.0025 \u22c5 |t|",
          "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
          "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t| | T | COPPER | COPPER - NICKEL Also known as: Constantan, Advance\u2122, Cupron\u2122 | 46 | \u2013 | \u2013 | \u2013185 to +300\u00b0C | \u2013250 to +400\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +125\u00b0C \u00b10.5\u00b0C 125\u00b0C to 350\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +133\u00b0C \u00b11.0\u00b0C 133\u00b0C to 350\u00b0C \u00b10.0075 \u22c5 |t| | J | IRON (magnetic) Also known as: Fe | COPPER - NICKEL Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 54 | 56 | 59 | +20 to +700\u00b0C | \u2013180 to +750\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 750\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 750\u00b0C \u00b10.0075 \u22c5 |t| | N | NICKEL - CHROMIUM -SILICON Also known as: Nicrosil | NICKEL - SILICON - MAGNESIUM Also known as: Nisil | 30 | 38 | 39 | 0 to +1150\u00baC | -270 to +1300\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075\u22c5 |t| | E | NICKEL - CHROMIUM Also known as: Chromel\u2122, Tophel\u2122, Chromium, Nickel | NICKEL - Aluminum Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 68 | 81 | \u2013 | 0 to +800\u00baC | -40 to +900\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 800\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 900\u00b0C \u00b10.0075 \u22c5 |t| | S | PLATINUM - 10% RHODIUM | PLATINUM | 8 | 9 | 11 | 0 to +1550\u00baC | -50 to +1750\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | 0\u00b0C to +1100\u00b0C \u00b11.0\u00b0C 1100\u00b0C to 1600\u00b0C \u00b1(1 +0.003 (t \u22c5 1100)\u00b0C | 0\u00b0C to +600\u00b0C \u00b11.5\u00b0C 600\u00b0C to 1600\u00b0C \u00b10.0025 \u22c5 |t| | R | PLATINUM - 13% RHODIUM | PLATINUM | 8 | 10 | 13 | 0 to +1600\u00baC | -50 to +1700\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | 0\u00b0C to +1100\u00b0C \u00b11.0\u00b0C 1100\u00b0C to 1600\u00b0C \u00b1(1 +0.003 (t \u22c5 1100)\u00b0C | 0\u00b0C to +600\u00b0C \u00b11.5\u00b0C 600\u00b0C to 1600\u00b0C \u00b10.0025 \u22c5 |t|",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_positive_color",
          "value": "Orange",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type R Thermocouple? In the UK and Europe, the most widely used colour code for Type R thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Orange, Negative Leg = White, Outer Sheath (Jacket) = Orange, Thermocouple Connector Colour = Orange",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_negative_color",
          "value": "White",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type R Thermocouple? In the UK and Europe, the most widely used colour code for Type R thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Orange, Negative Leg = White, Outer Sheath (Jacket) = Orange, Thermocouple Connector Colour = Orange",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_sheath_color",
          "value": "Orange",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type R Thermocouple? In the UK and Europe, the most widely used colour code for Type R thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Orange, Negative Leg = White, Outer Sheath (Jacket) = Orange, Thermocouple Connector Colour = Orange",
          "as_of": "2026-08-19"
        }
      ],
      "disagreements": [
        {
          "field": "citation",
          "versions": [
            {
              "value": "ANSI/ASTM Thermocouple Color Codes",
              "source": "https://thermometricscorp.com/thermocouple-color-codes.html",
              "source_quote": "Type | Positive conductor | Negative conductor | Positive color | Negative color | Extension-grade jacket | Thermocouple-grade jacket shown in legacy assets | T | Copper | Constantan | Blue | Red | Blue | Brown | J | Iron | Constantan | White | Red | Black | Brown | E | Chromel | Constantan | Purple | Red | Purple | Brown | K | Chromel | Alumel | Yellow | Red | Yellow | Brown | N | Nicrosil | Nisil | Orange | Red | Orange | Brown | S | Platinum 10% rhodium | Pure platinum | Black | Red | Green | None established in legacy asset | R | Platinum 13% rhodium | Pure platinum | Black | Red | Green | None established in legacy asset |",
              "as_of": "2026-08-19"
            },
            {
              "value": "ANSI and IEC Color Codes",
              "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
              "source_quote": "R R Do Not Insert in Metal NONE PLATINUM- Platinum Tubes. Beware of \u201350 to 1768\u00b0C \u20130.226 \u2013 \u2013 \u2013 13% RHODIUM Pt Contamination. ESTABLISHED High Temperature \u201358 to 3214\u00b0F to 21.101 Pt-13% Rh",
              "as_of": "2026-08-19"
            },
            {
              "value": "Thermocouple Tolerances",
              "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
              "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t| | T | COPPER | COPPER - NICKEL Also known as: Constantan, Advance\u2122, Cupron\u2122 | 46 | \u2013 | \u2013 | \u2013185 to +300\u00b0C | \u2013250 to +400\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +125\u00b0C \u00b10.5\u00b0C 125\u00b0C to 350\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +133\u00b0C \u00b11.0\u00b0C 133\u00b0C to 350\u00b0C \u00b10.0075 \u22c5 |t| | J | IRON (magnetic) Also known as: Fe | COPPER - NICKEL Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 54 | 56 | 59 | +20 to +700\u00b0C | \u2013180 to +750\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 750\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 750\u00b0C \u00b10.0075 \u22c5 |t| | N | NICKEL - CHROMIUM -SILICON Also known as: Nicrosil | NICKEL - SILICON - MAGNESIUM Also known as: Nisil | 30 | 38 | 39 | 0 to +1150\u00baC | -270 to +1300\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075\u22c5 |t| | E | NICKEL - CHROMIUM Also known as: Chromel\u2122, Tophel\u2122, Chromium, Nickel | NICKEL - Aluminum Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 68 | 81 | \u2013 | 0 to +800\u00baC | -40 to +900\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 800\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 900\u00b0C \u00b10.0075 \u22c5 |t| | S | PLATINUM - 10% RHODIUM | PLATINUM | 8 | 9 | 11 | 0 to +1550\u00baC | -50 to +1750\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | 0\u00b0C to +1100\u00b0C \u00b11.0\u00b0C 1100\u00b0C to 1600\u00b0C \u00b1(1 +0.003 (t \u22c5 1100)\u00b0C | 0\u00b0C to +600\u00b0C \u00b11.5\u00b0C 600\u00b0C to 1600\u00b0C \u00b10.0025 \u22c5 |t| | R | PLATINUM - 13% RHODIUM | PLATINUM | 8 | 10 | 13 | 0 to +1600\u00baC | -50 to +1700\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | 0\u00b0C to +1100\u00b0C \u00b11.0\u00b0C 1100\u00b0C to 1600\u00b0C \u00b1(1 +0.003 (t \u22c5 1100)\u00b0C | 0\u00b0C to +600\u00b0C \u00b11.5\u00b0C 600\u00b0C to 1600\u00b0C \u00b10.0025 \u22c5 |t|",
              "as_of": "2026-08-19"
            },
            {
              "value": "Thermocouple Colour Code Standards",
              "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
              "source_quote": "What is the Colour Code for a Type R Thermocouple? In the UK and Europe, the most widely used colour code for Type R thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Orange, Negative Leg = White, Outer Sheath (Jacket) = Orange, Thermocouple Connector Colour = Orange",
              "as_of": "2026-08-19"
            }
          ]
        }
      ]
    },
    {
      "thermocouple_type": "S",
      "positive_conductor": "Platinum 10% rhodium",
      "negative_conductor": "Pure platinum",
      "ansi_positive_color": "Black",
      "ansi_negative_color": "Red",
      "ansi_extension_jacket": "Green",
      "citation": "ANSI/ASTM Thermocouple Color Codes",
      "id": "s",
      "url": "https://referencesource.org/thermocouple-type-color-code-crosswalk/s/",
      "source": "https://thermometricscorp.com/thermocouple-color-codes.html",
      "source_quote": "Type | Positive conductor | Negative conductor | Positive color | Negative color | Extension-grade jacket | Thermocouple-grade jacket shown in legacy assets | T | Copper | Constantan | Blue | Red | Blue | Brown | J | Iron | Constantan | White | Red | Black | Brown | E | Chromel | Constantan | Purple | Red | Purple | Brown | K | Chromel | Alumel | Yellow | Red | Yellow | Brown | N | Nicrosil | Nisil | Orange | Red | Orange | Brown | S | Platinum 10% rhodium | Pure platinum | Black | Red | Green | None established in legacy asset |",
      "verified_fields": [
        "ansi_extension_jacket",
        "ansi_negative_color",
        "ansi_positive_color",
        "citation",
        "negative_conductor",
        "positive_conductor",
        "thermocouple_type"
      ],
      "also_reported": [
        {
          "field": "temperature_range",
          "value": "\u201350 to 1768\u00b0C",
          "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
          "source_quote": "S S Do Not Insert in Metal NONE PLATINUM- Platinum Tubes. Beware of \u2013 10% RHODIUM \u201350 to 1768\u00b0C \u20130.236 \u2013 \u2013 ESTABLISHED Pt Contamination. \u201358 to 3214\u00b0F High Temperature to 18.693 Pt-10% Rh",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_tolerance_class_1",
          "value": "0\u00b0C to +1100\u00b0C \u00b11.0\u00b0C 1100\u00b0C to 1600\u00b0C \u00b1(1 +0.003 (t \u22c5 1100)\u00b0C",
          "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
          "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t| | T | COPPER | COPPER - NICKEL Also known as: Constantan, Advance\u2122, Cupron\u2122 | 46 | \u2013 | \u2013 | \u2013185 to +300\u00b0C | \u2013250 to +400\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +125\u00b0C \u00b10.5\u00b0C 125\u00b0C to 350\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +133\u00b0C \u00b11.0\u00b0C 133\u00b0C to 350\u00b0C \u00b10.0075 \u22c5 |t| | J | IRON (magnetic) Also known as: Fe | COPPER - NICKEL Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 54 | 56 | 59 | +20 to +700\u00b0C | \u2013180 to +750\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 750\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 750\u00b0C \u00b10.0075 \u22c5 |t| | N | NICKEL - CHROMIUM -SILICON Also known as: Nicrosil | NICKEL - SILICON - MAGNESIUM Also known as: Nisil | 30 | 38 | 39 | 0 to +1150\u00baC | -270 to +1300\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075\u22c5 |t| | E | NICKEL - CHROMIUM Also known as: Chromel\u2122, Tophel\u2122, Chromium, Nickel | NICKEL - Aluminum Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 68 | 81 | \u2013 | 0 to +800\u00baC | -40 to +900\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 800\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 900\u00b0C \u00b10.0075 \u22c5 |t| | S | PLATINUM - 10% RHODIUM | PLATINUM | 8 | 9 | 11 | 0 to +1550\u00baC | -50 to +1750\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | 0\u00b0C to +1100\u00b0C \u00b11.0\u00b0C 1100\u00b0C to 1600\u00b0C \u00b1(1 +0.003 (t \u22c5 1100)\u00b0C | 0\u00b0C to +600\u00b0C \u00b11.5\u00b0C 600\u00b0C to 1600\u00b0C \u00b10.0025 \u22c5 |t|",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_tolerance_class_2",
          "value": "0\u00b0C to +600\u00b0C \u00b11.5\u00b0C 600\u00b0C to 1600\u00b0C \u00b10.0025 \u22c5 |t|",
          "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
          "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t| | T | COPPER | COPPER - NICKEL Also known as: Constantan, Advance\u2122, Cupron\u2122 | 46 | \u2013 | \u2013 | \u2013185 to +300\u00b0C | \u2013250 to +400\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +125\u00b0C \u00b10.5\u00b0C 125\u00b0C to 350\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +133\u00b0C \u00b11.0\u00b0C 133\u00b0C to 350\u00b0C \u00b10.0075 \u22c5 |t| | J | IRON (magnetic) Also known as: Fe | COPPER - NICKEL Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 54 | 56 | 59 | +20 to +700\u00b0C | \u2013180 to +750\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 750\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 750\u00b0C \u00b10.0075 \u22c5 |t| | N | NICKEL - CHROMIUM -SILICON Also known as: Nicrosil | NICKEL - SILICON - MAGNESIUM Also known as: Nisil | 30 | 38 | 39 | 0 to +1150\u00baC | -270 to +1300\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075\u22c5 |t| | E | NICKEL - CHROMIUM Also known as: Chromel\u2122, Tophel\u2122, Chromium, Nickel | NICKEL - Aluminum Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 68 | 81 | \u2013 | 0 to +800\u00baC | -40 to +900\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 800\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 900\u00b0C \u00b10.0075 \u22c5 |t| | S | PLATINUM - 10% RHODIUM | PLATINUM | 8 | 9 | 11 | 0 to +1550\u00baC | -50 to +1750\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | 0\u00b0C to +1100\u00b0C \u00b11.0\u00b0C 1100\u00b0C to 1600\u00b0C \u00b1(1 +0.003 (t \u22c5 1100)\u00b0C | 0\u00b0C to +600\u00b0C \u00b11.5\u00b0C 600\u00b0C to 1600\u00b0C \u00b10.0025 \u22c5 |t|",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_positive_color",
          "value": "Orange",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type S Thermocouple? In the UK and Europe, the most widely used colour code for Type S thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Orange, Negative Leg = White, Outer Sheath (Jacket) = Orange, Thermocouple Connector Colour = Orange",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_negative_color",
          "value": "White",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type S Thermocouple? In the UK and Europe, the most widely used colour code for Type S thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Orange, Negative Leg = White, Outer Sheath (Jacket) = Orange, Thermocouple Connector Colour = Orange",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_sheath_color",
          "value": "Orange",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type S Thermocouple? In the UK and Europe, the most widely used colour code for Type S thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Orange, Negative Leg = White, Outer Sheath (Jacket) = Orange, Thermocouple Connector Colour = Orange",
          "as_of": "2026-08-19"
        }
      ],
      "disagreements": [
        {
          "field": "citation",
          "versions": [
            {
              "value": "ANSI/ASTM Thermocouple Color Codes",
              "source": "https://thermometricscorp.com/thermocouple-color-codes.html",
              "source_quote": "Type | Positive conductor | Negative conductor | Positive color | Negative color | Extension-grade jacket | Thermocouple-grade jacket shown in legacy assets | T | Copper | Constantan | Blue | Red | Blue | Brown | J | Iron | Constantan | White | Red | Black | Brown | E | Chromel | Constantan | Purple | Red | Purple | Brown | K | Chromel | Alumel | Yellow | Red | Yellow | Brown | N | Nicrosil | Nisil | Orange | Red | Orange | Brown | S | Platinum 10% rhodium | Pure platinum | Black | Red | Green | None established in legacy asset |",
              "as_of": "2026-08-19"
            },
            {
              "value": "ANSI and IEC Color Codes",
              "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
              "source_quote": "S S Do Not Insert in Metal NONE PLATINUM- Platinum Tubes. Beware of \u2013 10% RHODIUM \u201350 to 1768\u00b0C \u20130.236 \u2013 \u2013 ESTABLISHED Pt Contamination. \u201358 to 3214\u00b0F High Temperature to 18.693 Pt-10% Rh",
              "as_of": "2026-08-19"
            },
            {
              "value": "Thermocouple Tolerances",
              "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
              "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t| | T | COPPER | COPPER - NICKEL Also known as: Constantan, Advance\u2122, Cupron\u2122 | 46 | \u2013 | \u2013 | \u2013185 to +300\u00b0C | \u2013250 to +400\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +125\u00b0C \u00b10.5\u00b0C 125\u00b0C to 350\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +133\u00b0C \u00b11.0\u00b0C 133\u00b0C to 350\u00b0C \u00b10.0075 \u22c5 |t| | J | IRON (magnetic) Also known as: Fe | COPPER - NICKEL Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 54 | 56 | 59 | +20 to +700\u00b0C | \u2013180 to +750\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 750\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 750\u00b0C \u00b10.0075 \u22c5 |t| | N | NICKEL - CHROMIUM -SILICON Also known as: Nicrosil | NICKEL - SILICON - MAGNESIUM Also known as: Nisil | 30 | 38 | 39 | 0 to +1150\u00baC | -270 to +1300\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075\u22c5 |t| | E | NICKEL - CHROMIUM Also known as: Chromel\u2122, Tophel\u2122, Chromium, Nickel | NICKEL - Aluminum Also known as: Nickel-Copper, Constantan, Advance\u2122, Cupron\u2122 | 68 | 81 | \u2013 | 0 to +800\u00baC | -40 to +900\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 800\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 900\u00b0C \u00b10.0075 \u22c5 |t| | S | PLATINUM - 10% RHODIUM | PLATINUM | 8 | 9 | 11 | 0 to +1550\u00baC | -50 to +1750\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | 0\u00b0C to +1100\u00b0C \u00b11.0\u00b0C 1100\u00b0C to 1600\u00b0C \u00b1(1 +0.003 (t \u22c5 1100)\u00b0C | 0\u00b0C to +600\u00b0C \u00b11.5\u00b0C 600\u00b0C to 1600\u00b0C \u00b10.0025 \u22c5 |t|",
              "as_of": "2026-08-19"
            },
            {
              "value": "Thermocouple Colour Code Standards",
              "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
              "source_quote": "What is the Colour Code for a Type S Thermocouple? In the UK and Europe, the most widely used colour code for Type S thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Orange, Negative Leg = White, Outer Sheath (Jacket) = Orange, Thermocouple Connector Colour = Orange",
              "as_of": "2026-08-19"
            }
          ]
        }
      ]
    },
    {
      "thermocouple_type": "T",
      "positive_conductor": "Copper",
      "negative_conductor": "Constantan",
      "ansi_positive_color": "Blue",
      "ansi_negative_color": "Red",
      "ansi_extension_jacket": "Blue",
      "citation": "ANSI/ASTM Thermocouple Color Codes",
      "id": "t",
      "url": "https://referencesource.org/thermocouple-type-color-code-crosswalk/t/",
      "source": "https://thermometricscorp.com/thermocouple-color-codes.html",
      "source_quote": "Type | Positive conductor | Negative conductor | Positive color | Negative color | Extension-grade jacket | Thermocouple-grade jacket shown in legacy assets | T | Copper | Constantan | Blue | Red | Blue | Brown |",
      "verified_fields": [
        "ansi_extension_jacket",
        "ansi_negative_color",
        "ansi_positive_color",
        "citation",
        "negative_conductor",
        "positive_conductor",
        "thermocouple_type"
      ],
      "also_reported": [
        {
          "field": "temperature_range",
          "value": "\u2013270 to 400\u00b0C",
          "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
          "source_quote": "Mild Oxidizing, + + + + T T CONSTANTAN Reducing Vacuum or \u2013 \u2013 COPPER COPPER- Inert. Good Where \u2013270 to 400\u00b0C \u20136.258 to \u2013 \u2013 Cu Moisture Is Present. Low NICKEL Temperature & Cryogenic \u2013454 to 752\u00b0F 20.872 Cu\u2013Ni Applications",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_tolerance_class_1",
          "value": "\u201340\u00b0C to +125\u00b0C \u00b10.5\u00b0C 125\u00b0C to 350\u00b0C \u00b10.004\u22c5 |t|",
          "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
          "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t| | T | COPPER | COPPER - NICKEL Also known as: Constantan, Advance\u2122, Cupron\u2122 | 46 | \u2013 | \u2013 | \u2013185 to +300\u00b0C | \u2013250 to +400\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +125\u00b0C \u00b10.5\u00b0C 125\u00b0C to 350\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +133\u00b0C \u00b11.0\u00b0C 133\u00b0C to 350\u00b0C \u00b10.0075 \u22c5 |t|",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_tolerance_class_2",
          "value": "\u201340\u00b0C to +133\u00b0C \u00b11.0\u00b0C 133\u00b0C to 350\u00b0C \u00b10.0075 \u22c5 |t|",
          "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
          "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t| | T | COPPER | COPPER - NICKEL Also known as: Constantan, Advance\u2122, Cupron\u2122 | 46 | \u2013 | \u2013 | \u2013185 to +300\u00b0C | \u2013250 to +400\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +125\u00b0C \u00b10.5\u00b0C 125\u00b0C to 350\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +133\u00b0C \u00b11.0\u00b0C 133\u00b0C to 350\u00b0C \u00b10.0075 \u22c5 |t|",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_positive_color",
          "value": "Brown",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type T Thermocouple? In the UK and Europe, the most widely used colour code for Type T thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Brown, Negative Leg = White, Outer Sheath (Jacket) = Brown, Thermocouple Connector Colour = Brown",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_negative_color",
          "value": "White",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type T Thermocouple? In the UK and Europe, the most widely used colour code for Type T thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Brown, Negative Leg = White, Outer Sheath (Jacket) = Brown, Thermocouple Connector Colour = Brown",
          "as_of": "2026-08-19"
        },
        {
          "field": "iec_sheath_color",
          "value": "Brown",
          "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
          "source_quote": "What is the Colour Code for a Type T Thermocouple? In the UK and Europe, the most widely used colour code for Type T thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Brown, Negative Leg = White, Outer Sheath (Jacket) = Brown, Thermocouple Connector Colour = Brown",
          "as_of": "2026-08-19"
        }
      ],
      "disagreements": [
        {
          "field": "citation",
          "versions": [
            {
              "value": "ANSI/ASTM Thermocouple Color Codes",
              "source": "https://thermometricscorp.com/thermocouple-color-codes.html",
              "source_quote": "Type | Positive conductor | Negative conductor | Positive color | Negative color | Extension-grade jacket | Thermocouple-grade jacket shown in legacy assets | T | Copper | Constantan | Blue | Red | Blue | Brown |",
              "as_of": "2026-08-19"
            },
            {
              "value": "ANSI and IEC Color Codes",
              "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
              "source_quote": "Mild Oxidizing, + + + + T T CONSTANTAN Reducing Vacuum or \u2013 \u2013 COPPER COPPER- Inert. Good Where \u2013270 to 400\u00b0C \u20136.258 to \u2013 \u2013 Cu Moisture Is Present. Low NICKEL Temperature & Cryogenic \u2013454 to 752\u00b0F 20.872 Cu\u2013Ni Applications",
              "as_of": "2026-08-19"
            },
            {
              "value": "Thermocouple Tolerances",
              "source": "https://www.tc-inc.com/thermocouple/thermocouple-tolerances.html",
              "source_quote": "Thermocouple Output Tolerances to IEC 60584-1 | Type | + Leg | - Leg | 100\u00baC | 500\u00baC | 1000\u00baC | Continuous | Short Term | Type | Class 1 | Class 2 | K | NICKEL - CHROMIUM Also known as: Chromel\u2122, Thermokanthal KP*, NiCr, T1*, Tophel\u2122 | NICKEL - Aluminum (magnetic) Also known as: Ni-Al, Alumel\u2122, Thermokanthal KN\u2122, T2\u2122, NiAl\u2122 | 42 | 43 | 39 | 0 to +1100\u00baC | -180 to +1350\u00baC | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +375\u00b0C \u00b11.5\u00b0C 375\u00b0C to 1000\u00b0C \u00b10.004 \u22c5 |t| | \u201340\u00b0C to +333\u00b0C \u00b12.5\u00b0C 333\u00b0C to 1200\u00b0C \u00b10.0075 \u22c5 |t| | T | COPPER | COPPER - NICKEL Also known as: Constantan, Advance\u2122, Cupron\u2122 | 46 | \u2013 | \u2013 | \u2013185 to +300\u00b0C | \u2013250 to +400\u00b0C | Temperature Range Tolerance Value Temperature Range Tolerance Value | \u201340\u00b0C to +125\u00b0C \u00b10.5\u00b0C 125\u00b0C to 350\u00b0C \u00b10.004\u22c5 |t| | \u201340\u00b0C to +133\u00b0C \u00b11.0\u00b0C 133\u00b0C to 350\u00b0C \u00b10.0075 \u22c5 |t|",
              "as_of": "2026-08-19"
            },
            {
              "value": "Thermocouple Colour Code Standards",
              "source": "https://www.tc.co.uk/thermocouple-information/thermocouple-colour-code.html",
              "source_quote": "What is the Colour Code for a Type T Thermocouple? In the UK and Europe, the most widely used colour code for Type T thermocouple cable is to the international IEC 60584-3 standard which is as follows: Positive Leg = Brown, Negative Leg = White, Outer Sheath (Jacket) = Brown, Thermocouple Connector Colour = Brown",
              "as_of": "2026-08-19"
            }
          ]
        }
      ]
    },
    {
      "thermocouple_type": "U",
      "citation": "ANSI and IEC Color Codes",
      "id": "u",
      "url": "https://referencesource.org/thermocouple-type-color-code-crosswalk/u/",
      "source": "https://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf",
      "source_quote": "Extension Grade + + + U U NONE COPPER-LOW Connecting Wire for ESTABLISHED \u2013 COPPER R & S Thermocouples, \u2013 \u2013 Cu NICKEL Also Known as RX & SX Cu-Ni Extension Wire.",
      "verified_fields": [
        "citation",
        "thermocouple_type"
      ]
    }
  ]
}