Write short note on Thermocouple.

Question :

Write short note on Thermocouple.

Thermocouple is a temperature sensor that can detect the variation in temperature. In its construction, two different metals are joined construction, two different metals are joined together to form a junction. Its main principle is when the junction. Of two different metals are heated or exposed to high temperatures a potential across their terminals varies. So, the varying potential can be further used to measure the amount of change in temperature.