Thermocouple Wire Color Code & Specs

Thermocouple Wire Color Code & Specifications

For United States, Canada & Mexico

Thermocouple Wire ANSI Codes, Color Codes and Specifications
ANSI Code Color Code Positive
(+) Lead		 Negative
(-) Lead		 Temperature
Range		 Initial Calibration Tolerances
Standard
°C (whichever is greater)		 Special
°C (whichever is greater)
J Type J Iron Constantan
(45% Nickel,
55% Copper) 		 32-1382°F (0-750°C) ±2.2°C or ±0.75%  ±1.1°C or ±0.4%
K Type K Chromel®
(90% Nickel,
10% Chromium)		 Alumel
(95% Nickel,
2% Aluminum,
2% Manganese,
1% Silicon)		 32-2282°F (0-1250°C) ±2.2°C or ±0.75% ±1.1°C or ±0.4%
E Type E Chromel®
(90% Nickel,
10% Chromium)		 Constantan
(45% Nickel,
55% Copper)		 32-1652°F (0-900°C) ±1.7°C or ±0.5% ±1.0°C or ±0.4%
T Type T Copper Constantan
(45% Nickel,		 32-662°F (0-350°C) ±1°C or ±0.75% ±.5°C or ±0.4%
N Type N Nicrosil
(84.6% Nickel,
14% Chromium,
1.4% Silicon)		 Nisil
(95.6% Nickel,
4.4 % Silicon)		 32-2282°F (0-1250°C) ±2.2°C or ±0.75% ±1.1°C or ±0.4%
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