Thermocouple Color Identification Codes

The use of color codes for identification of thermocouple wire and thermocouple products has been adopted by various national and international standards organizations. In the following images, U.S., Canadian, European, Japanese and international thermocouple wire and extension grade wire color code standards are defined or illustrated. Charts courtesy of Pyromation.

ANSI-ASTM and Non-ANSI-ASTM Thermocouple Codes
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International Thermocouple Color Codes
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Recommended Temperature Limits and Color Codes
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For more information on thermocouples and temperatures sensors, contact Classic Controls by calling 863-644-3642 or visiting their web site at https://classiccontrols.com.