Thermocouple is one of the most commonly used temperature detection devices in industry. Its advantage is:

High measuring accuracy. Because the thermocouple is directly contacted with the measured object, it is not affected by the medium.

Wide measuring range. The commonly used thermocouple from -50~+1600 C can be continuous measurement, some special thermocouple minimum measured to -269 degrees (such as gold, iron nickel chromium) up to +2800 DEG C (such as tungsten rhenium).

Simple structure, easy to use. Thermocouples are usually made up of two different metal wires, and are not limited by size and opening.

1 basic principles of thermocouple temperature measurement

Two different materials of the conductor or semiconductor A and B welded together to form a closed loop, as shown in figure 2-1-1

Show. When the temperature difference exists between the two attachment points of conductor A and B between 1 and 2, the electromotive force is generated between them

A current in a circuit is formed, which is called the thermoelectric effect. Thermocouple is to use this effect to work