The principle of thermocouple:
Thermocouple is a temperature sensing element,
It is the temperature signal is converted into thermal electromotive force signal,
Convert the measured medium by the electric meter
Temperature. The basic principle of thermocouple temperature measurement are two different components of the homogeneous composed of a conductor loop,
When there is a temperature gradient at both ends,
There will be in the loop current through Seebeck at this time, will exist between the two ends
Electromotive force -- thermoelectric EMFs, which is called the Seebeck effect.