- Overview
Industrial thermocouple as the temperature measurement sensor, usually and display instruments, recording instruments and electronic regulating equipment use, it can be directly measured in various production processes 0~1800 DEG C liquid, steam and gas medium and solid surface temperature.
If the temperature transmitter is connected with the output of 4~20mA, 0~10V and other standards of current and voltage, the use of more convenient and reliable.
The structure and principle
Thermocouple assembly is composed of a temperature sensing element (thermocouple core), fixed device of stainless steel protective pipe, junction box and various uses.
Armored thermocouple has the characteristics of small diameter, arbitrary bending and strong vibration resistance than thermocouple assembly. Suitable for installation in the assembly type thermocouple cannot be installed occasions, its outer protection tube by different materials of stainless steel tube (for different working temperature, full of high density oxide insulator material, very suitable for installation in the harsh environment of the occasion.
Flameproof type thermocouple is often used in the production field with various inflammable and explosive chemical gas. If using thermal electric dipole is easy to cause an explosive gas atmosphere, so on this occasion must use flameproof thermocouple, factory production, burst thermocouple is suitable for in the D II BT1 - 6 and D II CT1 - 6 temperature group interval in with explosive gases in dangerous places.
The working principle of thermocouple conductors of two different components, both ends of the welding, forming a loop, directly measuring end called working end (hot side) connector terminal called cold end, when the hot end and the cold end temperature difference will in the loop produced thermal current, connected to the display instrument, meter will indicate the thermoelectric EMFs corresponding temperature, electric potential with temperature rise. Only the size of Thermal EMF and thermocouple material, both ends of the thermocouple and temperature, the length and the thickness.
