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CONTACT USType K Thermocouples

Thermocouple Grade
Temperature range °F/°C
-328/-200 2282/1250

Extension Grade
Temperature range °F/°C
32/0 392/200

International IEC 584-3
Alloy Combination
+ Lead : Nickel-Chromium Ni-Cr
- Lead : Nickel-Aluminum Ni-Al
Standard Limits of Error °C (whichever is greater)
2.2°C or 0.75% above 0°C
Special
1.1°C or 0.4%
Comments, Bare Wire Environment
Clean oxidizing and inert; limited use in vacuum or reducing;
wide temperature range; most popular calibration
Type J Thermocouples

Thermocouple Grade
Temperature range °F/°C
32/0 1382/750

Extension Grade
Temperature range °F/°C
32/0 392/200

International IEC 584-3
Alloy Combination
+ Lead : Iron Fe
- Lead : Copper-Nicket Cu-Ni
Standard Limits of Error °C (whichever is greater)
2.2°C or 0.75% above 0°C
Special
1.1°C or 0.4%
Comments, Bare Wire Environment
Reducing, Vacuum, Inert. Limited Use in Oxidizing at High Temperatures. Not Recommended for Low Temperatures.
Type T Thermocouples

Thermocouple Grade
Temperature range °F/°C
32/0 392/200

Extension Grade
Temperature range °F/°C
-328/-250 662/350

International IEC 584-3
Alloy Combination
+ Lead : Copper Cu
- Lead : Copper-Nickel Cu-Ni
Standard Limits of Error °C (whichever is greater)
1.0°C or 0.75% above 0°C
Special
0.5°C or 0.4%
Comments, Bare Wire Environment
Mild Oxidizing, Reducing Vacuum or Inert. Good Where Moisture Is Present. Low Temperature and Cryogenic Applications
Type R Thermocouples

Thermocouple Grade
Temperature range °F/°C
32/0 2642/1450

Extension Grade
Temperature range °F/°C
32/0 300/150

International IEC 584-3
Alloy Combination
+ Lead : Platinum-13% Rhodium Pt-13% Rh
- Lead : Platinum Pt
Standard Limits of Error °C (whichever is greater)
1.5°C or 0.25% above 0°C
Special
0.6°C or 0.1%
Comments, Bare Wire Environment
Oxidizing or Inert. Do Not Insert in Metal Tubes. Beware of Contamination. High Temperature
Type E Thermocouples

Thermocouple Grade
Temperature range °F/°C
-328/-200 1652/900

Extension Grade
Temperature range °F/°C
32/0 392/200

International IEC 584-3
Alloy Combination
+ Lead : Nickel-Chromium Ni-Cr
- Lead : Nickel-Aluminum Ni-Al
Standard Limits of Error °C (whichever is greater)
1.7°C or 0.5% above 0°C
Special
1.0°C or 0.4%
Oxidizing or Inert. Limited Use in Vacuum or Reducing. Highest EMF Change Per Degree
Type N Thermocouples

Thermocouple Grade
Temperature range °F/°C
-450/-270 2372/1300

Extension Grade
Temperature range °F/°C
32/0 392/200

International IEC 584-3
Alloy Combination
+ Lead : Nicrosil Ni-Cr-Si
- Lead : Nisil Ni-Si-Mg
Standard Limits of Error °C (whichever is greater)
2.2°C or 0.75% above 0°C
Special
1.1°C or 0.4%
Alternative to Type K. More Stable at High Temps
Type S Thermocouples

Thermocouple Grade
Temperature range °F/°C
32/0 2642/1400

Extension Grade
Temperature range °F/°C
32/0 300/150

International IEC 584-3
Alloy Combination
+ Lead : Platinum-10% Rhodium Pt-10% Rh
- Lead : Platinum Pt
Standard Limits of Error °C (whichever is greater)
1.5°C or 0.25% above 0°C
Special
0.6°C or 0.1%
Oxidizing or Inert. Do Not Insert in Metal Tubes. Beware of Contamination. High Temperature
Type C Thermocouples

Thermocouple Grade
Temperature range °F/°C
32/0 4208/2320

Extension Grade
Temperature range °F/°C
32/0 1600/870
Alloy Combination
+ Lead : TUNGSTEN-5% RHENIUM W-5% Re
- Lead : TUNGSTEN-26% RHENIUM W-26% Re
Standard Limits of Error °C (whichever is greater)
4.5°C or 1.0% above 0°C
Vacuum, Inert, Hydrogen. Beware of Embrittlement. Not Practical Below 399°C (750°F) Not for Oxidizing Atmosphere
Type B Thermocouples

Thermocouple Grade
Temperature range °F/°C
32/0 2642/1400

Extension Grade
Temperature range °F/°C
32/0 300/150
Alloy Combination
+ Lead : Platinum-30% Rhodium Pt-30% Rh
- Lead : Platinum-6% Rhodium Pt-6% Rh
Standard Limits of Error °C
0.5% over 800°C
Oxidizing or Inert. Do Not Insert in Metal Tubes. Beware of Contamination. High Temperature. Common Use in Glass Industry