C type thermocouple can be applied for high temperature up to 2300 °C and it must be used under high vacuum environment.

SPECIFICATIONS

Length	16"
Diameter of sheath	1/4"
Simplex Thermocouple Assembly	Assembly is epoxy sealed for vacuum service Molybdenum sheath Ungrounded hot junction 16" alumina insulation towards termination Termination is a standard temperature and standard size male plug (round pins)
Sheath Material	Molybdenum  (must be used under high vacuum)  1/2" of Hafnia insulation at the hot end
Positive Material	Tungsten-5% Rhenium
Negative Material	Tungsten-26% Rhenium
Lowest Working Temperature	1000 °C (under vacuum)
Highest Working Temperature	2300 °C (under vacuum or Ar gas )
Minimum Std. Error	+/-  FS 2%
Application Notes	C type thermocouple must be used under high vacuum or Ar gas Compensation wire is required for the connection to temperature controller The thermocouple is not bendable