If it's a thermocouple - it's a two wire thermopile that generates voltage based on the temperature. Before I go on - it could be a thermistor as well -MrCrowley wrote:Does anyone know how probe thermometers work? I have a cheap one that reads between -50*C and 300*C but every time it is turned on it now reads -48*C and then will occasionally jump to the correct temperature.
I've been thinking about taking it apart anyway so I can remove the steel probe and mount the small display.
If a wire junction is loose/broken in the "probe" setup - it could sporadically be sending 0V and then jumping to your correct reading - hence why it's jumping to -48*C (sometimes scaling isn't perfect on analog to digital things).
Just my guess!