Description
A thermocouple consists of two plates of different metals. Both plates are connected at one end and make a junction. The junction is placed on the element or surface where we want to measure the temperature. This junction is known as a hot junction. And the second end of the plate is kept at a lower temperature (room temperature). This junction is known as cold junction or reference junction.![Working of Thermocouple](http://www.electrical4u.com/wp-content/uploads/Working-of-Thermocouple.png)