D
For D, usable temperature range is 0 to 2320°C; source document is ANSI and IEC Color Codes, verified against its source on 2026-08-19.
- Type letter
- D verified
- Usable temperature range
- 0 to 2320°C verified
- Source document
- ANSI and IEC Color Codes verified
What the source says
D* D Vacuum, Inert, Hydrogen. + TUNGSTEN- TUNGSTEN- Beware of Embrittlement. Not Practical Below NO STANDARD NONE 0 to 2320°C USE ANSI – 3% RHENIUM 25% RHENIUM 399°C (750°F)–Not for ESTABLISHED W-3% Re W-25% Re 32 to 4208°F 0 to 39.506 COLOR CODE (W3) Oxidizing Atmosphere (W3)
— assets.omega.com, retrieved 2026-08-19
Source
- assets.omega.comhttps://assets.omega.com/pdf/test-and-measurement-equipment/temperature/sensors/thermocouple-probes/tc_colorcodes.pdf