What is a thermocouple?

The temperature of the thermocouple is a common testing sensor, office principle is used for sensing temperature temperature changes the potential volume on both ends. Thermocouple temperature sensor is a kind of test, as well as thermal resistance temperature sensor, but he and the difference of thermal resistance mainly lies in: first, the nature of the signal itself is resistance, thermal resistance, the change of temperature make the initiation of positive or negative value changes; And thermal coupling, is initiation induced voltage changes, he along with the change of temperature changes. Second, two kinds of sensor testing temperature range is not the same, thermal resistance testing usually 0 The temperature range of 150 degrees, thermal coupling testing 0 - Temperature range of 1000 degrees, what ever is low temperature testing, which is high temperature testing. Third, from the material points, thermal resistance is a kind of metal material, sharp changes with temperature of metallic materials, thermal coupling is bimetallic material, both two dissimilar metals, because the change of temperature, in two different initiation potential difference at both ends of the wire. www。 wuxiyibiao。 com