What is the structure of the thermocouple?
What is the structure of the thermocouple? In the case of
Thermocouple as a measurement of temperature sensors, and display instruments, recording instruments and electronic regulator supporting the use of it can be measured in a variety of production processes 0 ~ 1800 ℃ range of liquid, steam and gas medium and solid surface temperature.
If the mating output 4 ~ 20mA, 0 ~ 10V and other standard current, voltage signal temperature transmitter, the use of more convenient and reliable.
So what is the structure and principle of the thermocouple, it is only clear that this can be better use of thermocouple.
The assembled thermocouple is made up of a temperature sensing element (thermocouple core), a stainless steel protective tube, a junction box and a variety of fixtures.
Flameproof thermocouple is usually used in the production site with a variety of flammable, explosive and other chemical gases. If the use of ordinary thermocouples can easily lead to environmental gas explosion, so in this case must use flameproof thermocouple, the factory production of flameproof thermocouple for d Ⅱ BT1-6 and d Ⅱ CT1-6 temperature group interval with explosive gas Dangerous place.
The working principle of the thermocouple is: two different components of the conductor, both ends of the welding, the formation of the loop, direct measurement of the end of the work side (hot side) terminal called cold end, when the hot side and cold side temperature difference Will produce a thermal current in the loop, connected to the display instrument, the instrument will indicate the corresponding thermoelectromotive force corresponding to the temperature, the electromotive force increases with increasing temperature. The size of the thermoelectromotive force is only related to the material of the thermocouple and the temperature at both ends, regardless of the length and thickness of the thermocouple.
