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What is a thermocouple?

What is a thermocouple?

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.