High temperature thermocouples

High temperature thermocouples, also called exotic thermocouples, are used in applications where base metal thermocouples, such as stainless steel or Inconel, cannot be used because of extreme temperatures or hazardous environments. The exotic thermocouples can be used in vacuum, inert, oxidizing and reducing atmospheres.

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Our exotic thermocouples can measure extraordinary temperatures of up to 2300°C in the most hazardous environments.

Kamet offers thermocouples specifically designed for hazardous environments. The high temperature thermocouples that can withstand the extreme temperatures in these environments are usually Type R, S, B, C or D thermocouples. Sheath materials that are produced for these high temperature applications are Molybdenum, Tantalum, Tungsten 3% Rhenium, Pt10%Rh and Pt20%Rh.

Molybdenum type S thermocouple

Molybdenum type S thermocouple, for inert, vacuum and reducing atmospheres. This thermocouple can measure up to 2000°C.


Pt10%Rh sheathed type B thermocouple

Pt10%Rh sheathed type B thermocouple for inert and oxidizing environments. This thermocouple can measure up to 1550°C.


Tantalum type C thermocouple

Tantalum sheathed type C thermocouple for inert and vacuum environments. This thermocouple can measure up to 2200°C.

Insulation & application

The high temperature thermocouples produced by ARI industries are insulated with material varying from magnesium oxide, alumina oxide and hafnium oxide. These compounds provide long term stability to the thermocouples. Applications where the thermocouples are being used can vary from gas furnaces and high temperature ovens to vacuum furnaces and reaction furnaces.

Insulation & application

ARi industries is our main supplier for high temperature thermocouples. This US company was among the first to manufacture mineral insulated cables and now also produces high temperature thermocouples. Next to thermocouples, ARi industries supplies us with thermocouple type S, R and B mineral insulated cables, which we keep in stock for the European market. Typically these types of thermocouples contain an Inconel sheath.


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