Thermocouple Wire Color Reference Chart Type K, J and N USA and International IEC 584-3

Thermocouple Lead Wire Color Reference Chart Type K, J and N for USA and International IEC 584-3. Click on the title to go to the chart.

Check Out Most Commonly Used Thermocouples Here.

ANSI Code		J	K	N
Alloy Combination	+ Lead	IRON Fe (magnetic)	NICKEL-CHROMIUM Ni-Cr	NICROSIL Ni-Cr-Si
Alloy Combination	- Lead	CONSTANTAN COPPER-NICKEL Cu-Ni	NICKEL-ALUMINUM Ni-AI (magnetic)	NISIL Ni-Si-Mg
Color Coding USA & Canada	Thermocouple Grade
Color Coding USA & Canada	Extension Grade
Maximum Useful Temperature Range ++	Thermocouple Grade	32 to 1382°F 0 to 750°C	–328 to 2282°F –200 to 1250°C	–450 to 2372°F –270 to 1300°C
Maximum Useful Temperature Range ++	Extension Grade	32 to 392°F 0 to 200°C	32 to 392°F 0 to 200°C	32 to 392°F 0 to 200°C
Maximum Thermocouple Grade Temperature Range		–346 to 2193°F –210 to 1200°C	–454 to 2501°F –270 to 1372°C	–450 to 2372°F –270 to 1300°C
EMF (mV) Over Max. Temperature Range		–8.095 to 69.553	–6.458 to 54.886	–4.345 to 47.513
Standard Limits of Error** (above O°C)		greater of 2.2°C or 0.75%	greater of 2.2°C or 0.75%	greater of 2.2°C or 0.75%
Special Limits of Error** (above O°C)		greater of 1.1°C or 0.4%	greater of 1.1°C or 0.4%	greater of 1.1°C or 0.4%
International IEC 584-3
Comments Environment — Bare Wire		Reducing, Vacuum, Inert. Limited Use in Oxidizing at High Temperatures. Not Recommended for Low Temperatures.	Clean Oxidizing and Inert. Limited Use in Vacuum or Reducing. Wide Temperature Range, Most Popular Calibration	Alternative to Type K. More Stable at High Temps

++ Except as further restricted by temperature limits for T/C diameter and insulation tables that follow.
* Not official symbol or standard designation.
** For controlled initial accuracy below 0°C, ask sales department

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Thermocouple Wire Color Reference Chart Type K, J and N USA and International IEC 584-3

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