Thermocouple is a electrical device that converts the heat energy into electrical form of energy. Thermocouple follows the thermoelectric effect and produces a usable temperature dependent voltage. Although usable emf is induced in thermocouple, the induced emf is very small.
Thermo-couple basically works on basis of three principles:
1) Seebeck Effect:
The Seebeck effect states that when two
different or unlike metals are joined together at two junctions and the two junctions are provided by two different temperatures, an
electromotive force (emf) is generated between the two junctions. The amount of emf
generated is different for different combinations of the metals and is directly proportional to the change in temperature between two junctions.
