Details of the thermocouple temperature measurement conditions Shanghai dragon instrument electric appliance co. , LTD

Thermocouple is a temperature sensing element, is a kind of an instrument, thermocouple temperature measurement directly. Composed of two different composition material of the conductor closed loop, because material is different, different electron diffusion of electron density, stable equilibrium is produced after electric potential. When temperature gradient is at both ends, the loop will be current, produce thermoelectric emfs, the bigger the temperature difference, the greater the current will be. Temperature measured after the thermoelectric emfs can know. Thermocouple in practice is a kind of energy converter, can convert heat into electricity. Thermocouple technical advantages: wide range of thermocouple temperature measurement, the performance is stable; High measurement accuracy, thermocouple direct contact with the object being measured, not affected by the intermediate medium; Heat fast response time, thermocouple temperature response sensitivity; Wide measurement range, the thermocouple 40 ~ + 1600 ℃ can be continuous temperature measurement; Thermocouple reliable performance, good mechanical strength. Long use life, install lunch. Galvanic couple must be composed of two different nature but fit a certain request of conductor ( Or a semiconductor) Data constitute a loop. Thermocouple measurement must have a temperature difference between side and reference. The two different information conductor or semiconductor welding, A and B constitute A closed loop. When conductor A and B two persistent point temperature difference between 1 and 2, occurs between the electromotive force, and therefore constitute A the size of the current in the circuit, this kind of phenomenon called the thermoelectric effect. Thermocouple is using this effect to work.