Thermocouple sensors

A thermocouple is a temperature sensor that uses the Seebeck effect, named after Estonian physicist Thomas Seebeck, who accidentally discovered it in 1822. A thermocouple consists of two wires of different metal alloy metals connected together. If there is a temperature difference between the two contact points, they produce an voltage as a result of the Seebeck effect, and this voltage can be interpreted to measure temperature.