What are the color codes for thermocouples?

Submitted byglx25v onFri, 08/17/2018 - 17:29

Thermocouple Color Codes:

Thermocouple wiring is color coded by thermocouple types. Different countries utilize different color coding. Jacket coloring is sometimes a colored stripe instead of a solid color as shown.

United States ASTM:



British BS1843: 1952:


British BS4937: Part 30: 1993:



French NFE:


German DIN:

Go To ISE Thermocouple Data Sheet Page.