The technological characteristics and application of thermocouple principle is what _ instrument

Thermocouple is usually and display meter, recording meter, electronic computer and other systems. Thermocouple in the process of direct measurement of various production 0 ° c to 1300 ° c range of liquid, steam and gas medium and solid surface temperature. Thermocouple features less thermal response time, reduce the dynamic error; Flexible installation; Measuring range is large; High mechanical strength, good compression performance; The application principle of thermocouple electrode is composed of two different conductor material. When measuring the temperature difference is with the reference, the can produce thermoelectric potential, digital display of the table will show thermoelectric potential value. Two different ingredients of conductor on both ends of the welding, forming circuit, direct measuring WenDuan measuring head, terminal said reference. When measuring the temperature difference is with the reference, the thermoelectric potential will be in the loop, through compensation conductor should be connected to display instrument, the instrument will indicate on the thermocouple thermoelectric emf generated by the corresponding temperature value. The thermocouple thermoelectric emfs growth over the course of measuring the temperature, the size of the thermoelectric emfs and thermocouple temperature difference on both ends of the conductor material and, only has nothing to do with hot electrode length and diameter. The structure of the thermocouple is made even wire, insulation of magnesium oxide and by repeated drawing stainless steel protecting tube. Thermocouple products are mainly composed of terminal block, terminal and thermocouple basic structure, and with various mounting device. Thermocouple insulation type and hull type two kinds.