I have a multimeter which has a thermocouple I can plug in to get a temperature reading. I really like the thing, but the thermocouple itself isn't all that robust. Although the meter is capable of reading temperatures up to 1850F, I doubt the thermocouple would last long at only 400-500F. My question is, is it possible to buy another thermocouple and use it in place of the provided one and still get fairly accurate temperature readings? I was thinking of maybe using a thermocouple normally used in furnaces or hot water heaters.