Originally Posted by mathman
Originally Posted by sse
wth is a 'bimetal' therm


Laminate together two strips of different metals. The metals will have different coefficients of thermal expansion. When the bimetal strip heats up, one side will want to lengthen more than the other so the strip will become curved. The thermometer uses this deflection to generate a temperature reading.


A thermocouple (example: J type, K type) is also a bimetal temperature measure device/method. The junction of two dissimilar metals creates a voltage potential that is well defined for metallic pairs at optimal temperature ranges. Certainly a widely used method...thermoworks thermapen for example since we’re talking bbq. A step up from a RTD for sure.