Thermocouples are the simple, robust and inexpensive temperature sensors widely used in various processes and wide temperature ranges. It consists of two different metals, joined at their ends forming a closed circuit and which generates an electromotive force when the two junctions (T1 and T2) are kept at different temperatures.
Thermocouple Operation Diagram:
Thermocouples are available in various types or calibrations, so it is important to carefully select a thermocouple suitable for the specific application.
