Jeff Corr wrote:
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It sounds like I could use it to measure the EGT of my J69 turbojet.


Any thermocouple (type N) will handle EGT, at up to 1800 C. beyond that a type W1 thermocouple can handle up to around 2300. Conditioning is the hardest part T/C don't give out a lot of signal even at 1800 C.

Steve