Thermocouple combinations

The table shows the most frequently used thermocouple combinations.

Thermocouple Thermoelement Alloy Working
atmosphere
Temperature
range °C (°F)
Type K KP
KN
Thermothal P
Thermothal N
Oxidizing
Inert
-200 to +1260
(-328 to +2300)
Type E EP
EN
Thermothal P (EP)
Cuprothal (EN)
Oxidizing
Inert
-200 to +870
(-328 to +1600)
Type T TP
TN
Copper
Cuprothal (TN)
Oxidizing, vacuum
Reducing, inert
-200 to +370
(-328 to +700)
Type J JP
JN
Iron (JP)
Cuprothal (JN)
Oxidizing*
Reducing, inert, vacuum
0 to +760
(-32 to +1400)
Type N NP
NN
Nicrosil
Nisil
Oxidizing
Inert
-200 to +1260
(-328 to +2300)

*Limited use at high temperatures