Is a temperature sensing element, is a kind of instrument, thermocouple directly measure the temperature. A closed circuit composed of 2 conductors of different components, due to different materials, different electron densities produce electron diffusion, stable equilibrium will produce a potential. When there is a gradient temperature at both ends, there will be an electric current in the loop, generating a thermoelectric potential, and the greater the temperature difference, the greater the current will be. After measuring the thermoelectric potential, you can know the temperature value.
A thermocouple is actually an energy converter that converts heat energy into electrical energy. Technical advantages of Thermocouple: The thermocouple temperature measuring range is wide, the performance is stable, the measurement precision is high, the thermocouple is in direct contact with the object under test, it is not affected by the intermediate medium; The thermal response time is fast, the thermocouple has the flexibility to respond to the temperature change, the measurement range is large, the thermoelectric puppet from -40~+ 1600 ℃ The mechanical strength is good.
The use of long life, installation of Bento. The coupling must be made up of two conductors (or semiconductor) materials of different properties that fit certain requirements.
There must be a temperature difference between the thermocouple measuring end and the reference end. The conductors or semiconductors A and b of the two different data are welded together to form a closed loop. When there is a temperature difference between the two obsession points 1 and 2 of conductors A and B, there is an EMF between the two, so that a large current is formed in the loop, a phenomenon known as the thermoelectric effect.
Thermocouples are used to work with this effect.
