How thermocouple thermometer works?

A thermocouple thermometer works based on the Seebeck effect, which states that when two dissimilar metals are joined together and the junctions are at different temperatures, a voltage difference is generated. This voltage difference is proportional to the temperature difference between the two junctions.

In a thermocouple thermometer, two wires made of different metals are connected at one end, forming a thermocouple junction. The other ends of the wires are connected to a voltmeter. When the thermocouple junction is heated, the voltage difference between the two wires increases, and the voltmeter reading increases accordingly.

The relationship between the voltage difference and the temperature difference is known as the Seebeck coefficient. This coefficient is unique for each pair of metals used in the thermocouple, and it is provided by the manufacturer.

To measure temperature using a thermocouple thermometer, the thermocouple junction is placed in contact with the object whose temperature is to be measured. The voltage difference between the two wires is measured, and the temperature is calculated using the Seebeck coefficient.

Thermocouple thermometers are widely used in a variety of applications, including industrial, scientific, and medical settings. They are known for their accuracy, reliability, and durability.