Accuracy classes and maximum permissible errors that Directive 2014/32/EU (the Measuring Instruments Directive) assigns to instruments used for trade in the EU. Each record is one instrument type at one accuracy class under one measurement condition, with the permitted error the directive states. Covers the ten instrument-specific annexes: water meters (MI-001), gas meters and volume conversion devices (MI-002), active electrical energy meters (MI-003), thermal energy meters (MI-004), measuring systems for liquids other than water including fuel dispensers and road tankers (MI-005), automatic weighing instruments (MI-006), taximeters (MI-007), material measures (MI-008), dimensional measuring instruments (MI-009) and exhaust gas analysers (MI-010). Answers 'what is the maximum permissible error for a water meter', 'what accuracy class does a petrol pump have to be', 'MID accuracy class for a taximeter', 'allowed error on a weighbridge', 'thermal energy meter accuracy class 2 MPE' and 'is my fuel dispenser within tolerance'. The values are condition-dependent -- the error allowed at low flow differs from the error allowed at high flow, and in-service limits differ from new-instrument limits -- so a single percentage figure is almost always the wrong answer. A deliberate mirror: there is one original, but the numbers sit in ten annexes of a 300,000-character legal text with no per-instrument row structure, and search engines currently answer this question from document-sharing sites and equipment vendors rather than from the directive.

EU legislation reused under Commission Decision 2011/833/EU on the reuse of documents from the EU institutions. legislation.gov.uk content is Open Government Licence v3.0. Note the single-database volume advisory: one publisher supplies every record here, which is the EU/UK database right question -- mitigated by the source being legislation published under an explicit reuse decision.

Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Gas meter

**Annex:** IV

**Accuracy class:** 1.0

**Condition:** After durability test

**Maximum permissible error:** Variation not exceeding one-third of MPE

**Scope or member state option:** MI-002. Class 1.0 durability test variation.

> The variation of the measurement result after the durability test when compared with the initial measurement result shall not exceed one-third of the MPE in point 2.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Gas meter — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)

accuracy_class, annex, instrument_type, maximum_permissible_error


**Instrument type:** Water meter

**Annex:** III

**Accuracy class:** N/A (single class)

**Condition:** After durability test, lower zone (Q1 to Q2)

**Maximum permissible error:** Variation not exceeding 3 % of metered volume

**Scope or member state option:** MI-001. Durability test variation, lower zone.

> 3 % of the metered volume between Q 1 included and Q 2 excluded;

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Water meter — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)

accuracy_class, annex, instrument_type, maximum_permissible_error, scope_note


**Instrument type:** Water meter

**Annex:** III

**Accuracy class:** N/A (single class)

**Condition:** After durability test, upper zone (Q2 to Q4)

**Maximum permissible error:** Variation not exceeding 1.5 % of metered volume

**Scope or member state option:** MI-001. Durability test variation, upper zone.

> 1,5 % of the metered volume between Q 2 included and Q 4 included.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>


**Instrument type:** Gas meter

**Annex:** IV

**Accuracy class:** 1.5

**Condition:** After durability test, upper zone (Qt to Qmax)

**Maximum permissible error:** Variation not exceeding 2 %

**Scope or member state option:** MI-002. Class 1.5 durability test variation.

> The variation of the measurement result after the durability test when compared with the initial measurement result for the flow rates in the range Q t to Q max - shall not exceed the measurement result by more than 2 %.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>


**Instrument type:** Liquid measuring system (aircraft refuelling)

**Annex:** VII

**Accuracy class:** 0.5

**Condition:** Aircraft refuelling systems

**Maximum permissible error:** 0.5 %

**Scope or member state option:** MI-005. Accuracy class for aircraft refuelling.

> measuring systems for refuelling aircraft

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Liquid measuring system (aircraft refuelling) — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Automatic catchweigher

**Annex:** VIII

**Accuracy class:** XI, XII, XIII, XIIII / Y(I), Y(II), Y(a), Y(b)

**Condition:** All loads, automatic operation

**Maximum permissible error:** Per Tables 1-4

**Scope or member state option:** MI-006. Eight accuracy classes for catchweighers.

> These primary categories are further divided into four accuracy classes:

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Automatic catchweigher — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)

accuracy_class, annex, instrument_type, maximum_permissible_error, measurement_condition, scope_note


**Instrument type:** Gas meters and volume conversion devices — volume conversion device

**Annex:** Annex IV (MI-002)

**Condition:** ambient temperature 20 °C ± 3 °C, ambient humidity 60 % ± 15 %, nominal values for power supply

**Maximum permissible error:** ± 0,5 %

> 0,5 % at ambient temperature 20 °C ± 3 °C, ambient humidity 60 % ± 15 %, nominal values for power supply;

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Gas meters and volume conversion devices — volume conversion device — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Dimensional measuring instruments — area measuring instruments

**Annex:** Annex XI (MI-009)

**Maximum permissible error:** ± 1,0 %, but not less than 1 dm²

> The MPE is 1,0 %, but not less than 1 dm 2 .

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Dimensional measuring instruments — area measuring instruments — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Dimensional measuring instruments — multidimensional measuring instruments

**Annex:** Annex XI (MI-009)

**Maximum permissible error:** ± 1,0 d

**Scope or member state option:** d is the scale interval

> The MPE is ± 1,0 d.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Dimensional measuring instruments — multidimensional measuring instruments — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Area measuring instrument

**Annex:** XI

**Accuracy class:** N/A (single class)

**Condition:** Area of irregular shaped objects (e.g. leather)

**Maximum permissible error:** 1.0 %, but not less than 1 dm2

**Scope or member state option:** MI-009. Area measuring instrument MPE.

> The MPE is 1,0 %, but not less than 1 dm 2 .

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Area measuring instrument — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)

accuracy_class, annex, instrument_type, maximum_permissible_error, measurement_condition


**Instrument type:** Material measures of length

**Annex:** Annex X (MI-008)

**Accuracy class:** I

**Condition:** between two non-consecutive scale marks

**Maximum permissible error:** ± (0,1 + 0,1 L) mm, where L is length rounded up to next whole metre; c = 0,1 mm for terminal interval bounded by a surface

> ANNEX X MATERIAL MEASURES (MI-008) CHAPTER I Material measures of length The relevant essential requirements of Annex I, the specific requirements of this Annex and the conformity assessment procedures listed in this chapter, apply to material measures of length defined below. However, the requirement for the supply of a copy of declarations of conformity may be interpreted as applying to a batch or consignment rather than each individual instrument. DEFINITIONS Material measure of length | An instrument comprising scale marks whose distances are given in legal units of length. | SPECIFIC REQUIREMENTS Reference Conditions 1.1. | For tapes of length equal to or greater than 5 metres, the maximum permissible errors (MPEs) are to be met when a tractive force of fifty newtons or other force values as specified by the manufacturer and marked on the tape accordingly, or in the case of rigid or semi-rigid measures no tractive force is needed, is applied. | 1.2. | The reference temperature is 20 °C unless otherwise specified by the manufacturer and marked on the measure accordingly. | MPEs 2. | The MPE, positive or negative in mm, between two non-consecutive scale marks is (a + bL), where:

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Material measures of length — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Material measure of length

**Annex:** X

**Accuracy class:** I, II, III, D, S

**Condition:** Between two non-consecutive scale marks

**Maximum permissible error:** Formula (a + bL) mm; class-dependent a and b values

**Scope or member state option:** MI-008. Length measure MPE formula.

> The MPE, positive or negative in mm, between two non-consecutive scale marks is (a + bL), where:

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Material measure of length — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Taximeters

**Annex:** Annex IX (MI-007)

**Condition:** calculation of the fare

**Maximum permissible error:** ± 0,1 %, minimum including rounding: corresponding to the least significant digit of the fare indication

**Scope or member state option:** excluding any errors due to application of the taximeter in a taxi

> For the calculation of the fare: ± 0,1 % minimum, including rounding: corresponding to the least significant digit of the fare indication.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Taximeters — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Thermal energy meters — calculator

**Annex:** Annex VI (MI-004)

**Condition:** calculator sub-assembly

**Maximum permissible error:** E c = ± (0,5 + Δθmin/Δθ)

> The relative MPE of the calculator, expressed in %:

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Thermal energy meters — calculator — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)

annex, instrument_type, maximum_permissible_error, measurement_condition


**Instrument type:** Exhaust gas analysers

**Annex:** Annex XII (MI-010)

**Accuracy class:** 0

**Condition:** CO fraction

**Maximum permissible error:** ± 0,03 % vol or ± 5 %, whichever is greater

> Two classes (0 and I) are being defined for exhaust gas analysers. The relevant minimum measuring ranges for these classes are shown in Table 1. Table 1 Classes and measuring ranges | Parameter | Classes 0 and I | CO fraction |

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Exhaust gas analysers — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Exhaust gas analyser

**Annex:** XII

**Accuracy class:** 0

**Condition:** CO fraction

**Maximum permissible error:** +/- 0.03 % vol or +/- 5 %, whichever is greater

**Scope or member state option:** MI-010. Class 0 CO fraction MPE.

> ± 0,03 % vol

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Exhaust gas analyser — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)

annex, instrument_type, maximum_permissible_error, measurement_condition, scope_note


**Instrument type:** Exhaust gas analyser

**Annex:** XII

**Accuracy class:** 0 and I

**Condition:** CO2 fraction

**Maximum permissible error:** +/- 0.5 % vol or +/- 5 %, whichever is greater

**Scope or member state option:** MI-010. CO2 fraction MPE.

> ± 0,5 % vol

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>


**Instrument type:** Thermal energy meter

**Annex:** VI

**Accuracy class:** 1, 2, 3

**Condition:** Complete instrument, rated operating conditions

**Maximum permissible error:** Class-dependent formula

**Scope or member state option:** MI-004. Three accuracy classes.

> The following accuracy classes are defined for thermal energy meters: 1, 2, 3.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Thermal energy meter — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Thermal energy meter

**Annex:** VI

**Accuracy class:** 1, 2, 3

**Condition:** Complete instrument

**Maximum permissible error:** Formula-based per class (Ef + Et + Ec)

**Scope or member state option:** MI-004. MPE as percentage of true value.

> The maximum permissible relative errors applicable to a complete thermal energy meter, expressed in percent of the true value for each accuracy class, are:

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>


**Instrument type:** Thermal energy meters

**Annex:** Annex VI (MI-004)

**Accuracy class:** 1

**Condition:** complete thermal energy meter

**Maximum permissible error:** E = ± (2 + 4 Δθmin/Δθ + 0,01 qp/q)

**Scope or member state option:** E f , E t , E c according to points 7.1 to 7.3

> MPEs applicable to complete thermal energy meters The maximum permissible relative errors applicable to a complete thermal energy meter, expressed in percent of the true value for each accuracy class, are: — | For class 1: , with E f , E t , E c according to points 7.1 to 7.3.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Thermal energy meters — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Liquid measuring system (cryogenic)

**Annex:** VII

**Accuracy class:** 2.5

**Condition:** Cryogenic liquids (temperature below -153 degrees C)

**Maximum permissible error:** 2.5 %

**Scope or member state option:** MI-005. Accuracy class for cryogenic systems.

> measuring systems for cryogenic liquids (temperature below – 153 °C)

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Liquid measuring system (cryogenic) — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Active electrical energy meter

**Annex:** V

**Accuracy class:** A, B, C

**Condition:** Different temperature ranges

**Maximum permissible error:** Per Table 2, relevant range applies

**Scope or member state option:** MI-003. Temperature range selection.

> When a meter operates in different temperature ranges the relevant MPE values shall apply.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Active electrical energy meter — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Taximeters

**Annex:** Annex IX (MI-007)

**Condition:** distance travelled

**Maximum permissible error:** ± 0,2 %, minimum value of mpe: 4 m

**Scope or member state option:** excluding any errors due to application of the taximeter in a taxi

> For the distance travelled: ± 0,2 % minimum value of mpe: 4 m;

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

annex, instrument_type, maximum_permissible_error, scope_note


**Instrument type:** Taximeter

**Annex:** IX

**Accuracy class:** N/A (single class)

**Condition:** Distance travelled measurement

**Maximum permissible error:** +/- 0.2 %, minimum value 4 m

**Scope or member state option:** MI-007. Taximeter distance MPE.

> For the distance travelled: ± 0,2 %

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Taximeter — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Exhaust gas analyser

**Annex:** XII

**Accuracy class:** 0 and I

**Condition:** Each fraction measured, rated operating conditions

**Maximum permissible error:** Greater of absolute value or percentage of true value (per Table 2)

**Scope or member state option:** MI-010. Greater-of rule for MPEs.

> For each of the fractions measured, the maximum error value permitted under rated operating conditions according to point 1.1 of Annex I is the greater of the two values shown in Table 2. Absolute values are expressed in % vol or ppm vol, percentage values are percent of the true value.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>


**Instrument type:** Multidimensional measuring instrument

**Annex:** XI

**Accuracy class:** N/A (single class)

**Condition:** Edge length of smallest enclosing rectangular parallelepiped

**Maximum permissible error:** +/- 1.0 d (scale interval)

**Scope or member state option:** MI-009. Multidimensional measuring instrument MPE.

> The MPE is ± 1,0 d.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Multidimensional measuring instrument — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Gas meter

**Annex:** IV

**Accuracy class:** 1.5

**Condition:** Error after durability test

**Maximum permissible error:** Not exceeding twice the MPE in point 2

**Scope or member state option:** MI-002. Class 1.5 error after durability.

> The error of indication after the durability test shall not exceed twice the MPE in point 2.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Gas meter — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Water meter

**Annex:** III

**Accuracy class:** N/A (single class)

**Condition:** Error after durability test, lower zone (Q1 to Q2)

**Maximum permissible error:** +/- 6 % of metered volume

**Scope or member state option:** MI-001. Error after durability, lower zone.

> ± 6 % of the metered volume between Q 1 included and Q 2 excluded;

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Water meter — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Water meter

**Annex:** III

**Accuracy class:** N/A (single class)

**Condition:** Error after durability test, upper zone (Q2 to Q4), cold water (0.1-30 degrees C)

**Maximum permissible error:** +/- 2.5 % of metered volume

**Scope or member state option:** MI-001. Error after durability, upper zone, cold water.

> ± 2,5 % of the metered volume between Q 2 included and Q 4 included for water meters intended to meter water with a temperature between 0,1 °C and 30 °C,

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

accuracy_class, annex, maximum_permissible_error, scope_note


**Instrument type:** Water meter

**Annex:** III

**Accuracy class:** N/A (single class)

**Condition:** Error after durability test, upper zone (Q2 to Q4), hot water (30-90 degrees C)

**Maximum permissible error:** +/- 3.5 % of metered volume

**Scope or member state option:** MI-001. Error after durability, upper zone, hot water.

> ± 3,5 % of the metered volume between Q 2 included and Q 4 included for water meters intended to meter water with a temperature between 30 °C and 90 °C.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>


**Instrument type:** Taximeter

**Annex:** IX

**Accuracy class:** N/A (single class)

**Condition:** Fare calculation

**Maximum permissible error:** +/- 0.1 %, minimum corresponding to least significant digit

**Scope or member state option:** MI-007. Taximeter fare calculation MPE.

> For the calculation of the fare: ± 0,1 %

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>


**Instrument type:** Thermal energy meters — flow sensor

**Annex:** Annex VI (MI-004)

**Accuracy class:** 1

**Condition:** flow sensor sub-assembly

**Maximum permissible error:** E f = ± (1 + 0,01 qp/q), but not more than 5 %

> Class 1: , but not more than 5 %,

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Thermal energy meters — flow sensor — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Fuel dispenser (not liquefied gases)

**Annex:** VII

**Accuracy class:** 0.5

**Condition:** Fuel dispensers for non-liquefied-gas fuels

**Maximum permissible error:** 0.5 %

**Scope or member state option:** MI-005. Accuracy class for fuel dispensers.

> fuel dispensers (not for liquefied gases),

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Fuel dispenser (not liquefied gases) — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Gas meter

**Annex:** IV

**Accuracy class:** N/A

**Condition:** Gas meter with temperature conversion, 30 degrees C range

**Maximum permissible error:** MPE increased by 0.5 %

**Scope or member state option:** MI-002. Temperature conversion additional MPE.

> For a gas meter with temperature conversion, which only indicates the converted volume, the MPE of the meter is increased by 0,5 % in a range of 30 °C extending symmetrically around the temperature specified by the manufacturer that lies between 15 °C and 25 °C. Outside this range, an additional increase of 0,5 % is permitted in each interval of 10 °C.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>


**Instrument type:** Exhaust gas analysers

**Annex:** Annex XII (MI-010)

**Accuracy class:** 0

**Condition:** HC fraction

**Maximum permissible error:** ± 10 ppm vol or ± 5 %, whichever is greater

> Two classes (0 and I) are being defined for exhaust gas analysers. The relevant minimum measuring ranges for these classes are shown in Table 1. Table 1 Classes and measuring ranges | Parameter | Classes 0 and I | CO fraction | from 0 to 5 % vol | CO 2 fraction | from 0 to 16 % vol | HC fraction |

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>


**Instrument type:** Exhaust gas analyser

**Annex:** XII

**Accuracy class:** 0

**Condition:** HC fraction

**Maximum permissible error:** +/- 10 ppm vol or +/- 5 %, whichever is greater

**Scope or member state option:** MI-010. Class 0 HC fraction MPE.

> ± 10 ppm vol

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>


**Instrument type:** Exhaust gas analyser

**Annex:** XII

**Accuracy class:** N/A

**Condition:** Lambda value calculation

**Maximum permissible error:** 0.3 %

**Scope or member state option:** MI-010. Lambda calculation MPE.

> The MPE on lambda calculation is 0,3 %.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>


**Instrument type:** Liquid measuring system (liquefied carbon dioxide)

**Annex:** VII

**Accuracy class:** 1.5

**Condition:** Liquefied carbon dioxide

**Maximum permissible error:** 1.5 %

**Scope or member state option:** MI-005. Accuracy class for liquefied CO2.

> Measuring systems for liquefied carbon dioxide

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Liquid measuring system (liquefied carbon dioxide) — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Liquid measuring system (liquefied gases, >= -10 C)

**Annex:** VII

**Accuracy class:** 1.0

**Condition:** Liquefied gases under pressure, temperature >= -10 degrees C

**Maximum permissible error:** 1.0 %

**Scope or member state option:** MI-005. Accuracy class for liquefied gas systems.

> Measuring systems for liquefied gases under pressure measured at a temperature equal to or above – 10 °C

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Liquid measuring system (liquefied gases, >= -10 C) — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Liquid measuring system (liquefied gases, < -10 C)

**Annex:** VII

**Accuracy class:** 1.5

**Condition:** Liquefied gases under pressure, temperature below -10 degrees C (not cryogenic)

**Maximum permissible error:** 1.5 %

**Scope or member state option:** MI-005. Accuracy class for cold liquefied gas systems.

> Measuring systems for liquefied gases under pressure measured at a temperature below – 10 °C (other than cryogenic liquids)

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Liquid measuring system (liquefied gases, < -10 C) — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Water meter

**Annex:** III

**Accuracy class:** N/A (single class)

**Condition:** Lower zone (Q1 to Q2 excluded), any water temperature

**Maximum permissible error:** 5 %

**Scope or member state option:** MI-001. Volume measurement, lower zone.

> The MPE, positive or negative, on volumes delivered at flowrates between the minimum flowrate (Q 1 ) and the transitional flowrate (Q 2 ) (excluded) is 5 % for water having any temperature.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>


**Instrument type:** Gas meter

**Annex:** IV

**Accuracy class:** 1.5

**Condition:** Lower zone (Qmin to Qt), volume or mass at metering conditions

**Maximum permissible error:** 3 %

**Scope or member state option:** MI-002. Class 1.5 gas meter, lower zone MPE.

> 2.1. Gas meter indicating the volume at metering conditions or mass

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>


**Instrument type:** Length measuring instrument (for rope-type materials)

**Annex:** XI

**Accuracy class:** I

**Condition:** Measurement of textiles, bands, cables, etc.

**Maximum permissible error:** 0.125 %, but not less than 0.005 Lm

**Scope or member state option:** MI-009. Length measuring instrument Class I.

> 0,125 %, but not less than 0,005 L m

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Length measuring instrument (for rope-type materials) — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Liquid measuring system (milk)

**Annex:** VII

**Accuracy class:** 0.5

**Condition:** Milk measuring systems

**Maximum permissible error:** 0.5 %

**Scope or member state option:** MI-005. Accuracy class for milk systems.

> measuring systems for milk

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Liquid measuring system (milk) — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Exhaust gas analyser

**Annex:** XII

**Accuracy class:** 0 and I

**Condition:** O2 fraction

**Maximum permissible error:** +/- 0.1 % vol or +/- 5 %, whichever is greater

**Scope or member state option:** MI-010. O2 fraction MPE.

> ± 0,1 % vol

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>


**Instrument type:** Gas meters and volume conversion devices — volume conversion device

**Annex:** Annex IV (MI-002)

**Condition:** other conversion devices at rated operating conditions

**Maximum permissible error:** ± 1 %

> 1 % for other conversion devices at rated operating conditions.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Gas meters and volume conversion devices — volume conversion device — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Liquid measuring system (pipeline)

**Annex:** VII

**Accuracy class:** 0.3

**Condition:** Pipeline measuring systems

**Maximum permissible error:** 0.3 %

**Scope or member state option:** MI-005. Accuracy class for pipeline systems.

> Measuring systems on pipeline

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Liquid measuring system (pipeline) — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Water meters

**Annex:** Annex III (MI-001)

**Condition:** Q1 ≤ Q < Q2

**Maximum permissible error:** ± 5 %

> The MPE, positive or negative, on volumes delivered at flowrates between the minimum flowrate (Q 1 ) and the transitional flowrate (Q 2 ) (excluded) is 5 % for water having any temperature.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Water meters — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Water meters

**Annex:** Annex III (MI-001)

**Condition:** Q2 ≤ Q ≤ Q4, water temperature > 30 °C

**Maximum permissible error:** ± 3 %

> 3 % for water having a temperature > 30 °C.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>


**Instrument type:** Liquid measuring system (other than water)

**Annex:** VII

**Accuracy class:** 0.3, 0.5, 1.0, 1.5, 2.5

**Condition:** Quantities >= 2 litres, measuring systems

**Maximum permissible error:** 0.3 % to 2.5 % depending on accuracy class

**Scope or member state option:** MI-005. Five accuracy classes for measuring systems and meters.

> 2.1. For quantities equal to or greater than 2 litres the MPE on indications is:

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Liquid measuring system (other than water) — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Active electrical energy meter

**Annex:** V

**Accuracy class:** A, B, C

**Condition:** Rated operating conditions at varying load current

**Maximum permissible error:** Per Table 2

**Scope or member state option:** MI-003. MPEs per class, temperature range, and load.

> MPEs in percent at rated operating conditions and defined load current levels and operating temperature

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>


**Instrument type:** Volume conversion device (other type)

**Annex:** IV

**Accuracy class:** N/A

**Condition:** Rated operating conditions

**Maximum permissible error:** 1 %

**Scope or member state option:** MI-002. Other conversion device MPE.

> 1 % for other conversion devices at rated operating conditions.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Volume conversion device (other type) — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)

accuracy_class, annex, instrument_type, scope_note


**Instrument type:** Volume conversion device (temperature type)

**Annex:** IV

**Accuracy class:** N/A

**Condition:** Rated operating conditions

**Maximum permissible error:** 0.7 %

**Scope or member state option:** MI-002. Temperature conversion device MPE.

> 0,7 % for temperature conversion devices at rated operating conditions;

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Volume conversion device (temperature type) — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Active electrical energy meter

**Annex:** V

**Accuracy class:** A, B, C

**Condition:** Rated operating conditions

**Maximum permissible error:** Class-dependent, per Table 2 of Annex V

**Scope or member state option:** MI-003. Three class indices defined.

> The manufacturer shall specify the class index of the meter. The class indices are defined as: Class A, B and C.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Active electrical energy meter — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Exhaust gas analyser

**Annex:** XII

**Accuracy class:** 0, I

**Condition:** Rated operating conditions

**Maximum permissible error:** Per Table 2 of Annex XII

**Scope or member state option:** MI-010. Two classes defined.

> Two classes (0 and I) are being defined for exhaust gas analysers. The relevant minimum measuring ranges for these classes are shown in Table 1.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Exhaust gas analyser — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)

accuracy_class, annex, maximum_permissible_error, measurement_condition


**Instrument type:** Taximeter

**Annex:** IX

**Accuracy class:** N/A (single class)

**Condition:** Real-time clock timekeeping

**Maximum permissible error:** 0.02 %

**Scope or member state option:** MI-007. Taximeter clock accuracy.

> the timekeeping shall have an accuracy of 0,02 %;

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Taximeter — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Volume conversion device

**Annex:** IV

**Accuracy class:** N/A

**Condition:** Reference conditions (20 degrees C +/- 3, 60% humidity +/- 15%)

**Maximum permissible error:** 0.5 %

**Scope or member state option:** MI-002. Volume conversion device at reference conditions.

> 0,5 % at ambient temperature 20 °C ± 3 °C, ambient humidity 60 % ± 15 %, nominal values for power supply;

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Volume conversion device — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Liquid measuring system (road tankers, low viscosity)

**Annex:** VII

**Accuracy class:** 0.5

**Condition:** Road tanker systems, liquids of low viscosity (< 20 mPa.s)

**Maximum permissible error:** 0.5 %

**Scope or member state option:** MI-005. Accuracy class for road tanker systems.

> measuring systems on road tankers for liquids of low viscosity (< 20 mPa.s)

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Liquid measuring system (road tankers, low viscosity) — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Automatic weighing instruments — automatic gravimetric filling instruments

**Annex:** Annex VIII (MI-006)

**Accuracy class:** Ref(x)

**Condition:** static loads

**Maximum permissible error:** 0,312 of the maximum permissible deviation of each fill from the average, as specified in Table 5, multiplied by the class designation factor (x)

> For static loads under rated operating conditions, the MPE for reference accuracy class Ref(x), shall be 0,312 of the maximum permissible deviation of each fill from the average; as specified in Table 5; multiplied by the class designation factor (x).

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Automatic weighing instruments — automatic gravimetric filling instruments — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Automatic gravimetric filling instrument

**Annex:** VIII

**Accuracy class:** Ref(x), X(x)

**Condition:** Static loads, rated operating conditions

**Maximum permissible error:** 0.312 of max permissible deviation times factor (x)

**Scope or member state option:** MI-006. Filling instrument static weighing error.

> For static loads under rated operating conditions, the MPE for reference accuracy class Ref(x), shall be 0,312 of the maximum permissible deviation of each fill from the average; as specified in Table 5; multiplied by the class designation factor (x).

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Automatic gravimetric filling instrument — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Gas meters and volume conversion devices

**Annex:** Annex IV (MI-002)

**Accuracy class:** 1,5

**Condition:** temperature conversion, 30 °C range around specified temperature

**Maximum permissible error:** MPE increased by 0,5 %

**Scope or member state option:** For a gas meter with temperature conversion, which only indicates the converted volume, the MPE of the meter is increased by 0,5 % in a range of 30 °C extending symmetrically around the temperature specified by the manufacturer that lies between 15 °C and 25 °C.

> For a gas meter with temperature conversion, which only indicates the converted volume, the MPE of the meter is increased by 0,5 % in a range of 30 °C extending symmetrically around the temperature specified by the manufacturer that lies between 15 °C and 25 °C. Outside this range, an additional increase of 0,5 % is permitted in each interval of 10 °C.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Gas meters and volume conversion devices — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Gas meters and volume conversion devices — volume conversion device

**Annex:** Annex IV (MI-002)

**Condition:** temperature conversion devices at rated operating conditions

**Maximum permissible error:** ± 0,7 %

> 0,7 % for temperature conversion devices at rated operating conditions;

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>


**Instrument type:** Thermal energy meters — temperature sensor pair

**Annex:** Annex VI (MI-004)

**Condition:** temperature sensor pair sub-assembly

**Maximum permissible error:** E t = ± (0,5 + 3 Δθmin/Δθ)

> The relative MPE of the temperature sensor pair, expressed in %:

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Thermal energy meters — temperature sensor pair — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Taximeters

**Annex:** Annex IX (MI-007)

**Condition:** time elapsed

**Maximum permissible error:** ± 0,1 %, minimum value of mpe: 0,2 s

**Scope or member state option:** excluding any errors due to application of the taximeter in a taxi

> For the time elapsed: ± 0,1 % minimum value of mpe: 0,2 s;

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Taximeters — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Taximeter

**Annex:** IX

**Accuracy class:** N/A (single class)

**Condition:** Time elapsed measurement

**Maximum permissible error:** +/- 0.1 %, minimum value 0.2 s

**Scope or member state option:** MI-007. Taximeter time MPE.

> For the time elapsed: ± 0,1 %

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>


**Instrument type:** Continuous totaliser

**Annex:** VIII

**Accuracy class:** 0.5, 1, 2

**Condition:** Totalised load

**Maximum permissible error:** +/- 0.25 % to +/- 1.0 % depending on class

**Scope or member state option:** MI-006. Three accuracy classes for continuous totalisers.

> Instruments are divided into three accuracy classes as follows: 0,5; 1; 2.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Continuous totaliser — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Discontinuous totaliser

**Annex:** VIII

**Accuracy class:** 0.2, 0.5, 1, 2

**Condition:** Totalised load

**Maximum permissible error:** +/- 0.10 % to +/- 1.00 % depending on class

**Scope or member state option:** MI-006. Four accuracy classes for discontinuous totalisers.

> Instruments are divided into four accuracy classes as follows: 0,2; 0,5; 1; 2.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Discontinuous totaliser — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Water meter

**Annex:** III

**Accuracy class:** N/A (single class)

**Condition:** Upper zone (Q2 included to Q4), water temperature <= 30 degrees C

**Maximum permissible error:** 2 %

**Scope or member state option:** MI-001. Volume measurement, upper zone, cold water.

> 2 % for water having a temperature ≤ 30 °C,

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Water meter — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)


**Instrument type:** Gas meter

**Annex:** IV

**Accuracy class:** 1.5

**Condition:** Upper zone (Qt to Qmax), volume or mass at metering conditions

**Maximum permissible error:** 1.5 %

**Scope or member state option:** MI-002. Class 1.5 gas meter, upper zone MPE.

> The gas meter shall not exploit the MPEs or systematically favour any party.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Gas meter — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)

accuracy_class, annex, maximum_permissible_error, measurement_condition, scope_note


**Instrument type:** Automatic rail weighbridge

**Annex:** VIII

**Accuracy class:** 0.2, 0.5, 1, 2

**Condition:** Weighing-in-motion, single wagon or total train

**Maximum permissible error:** +/- 0.1 % to +/- 1.0 % depending on class

**Scope or member state option:** MI-006. Four accuracy classes for rail weighbridges.

> The MPEs for weighing-in-motion of a single wagon or a total train are shown in Table 9.

Source: <https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032>

Automatic rail weighbridge — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)