The difference between the thermocouple and thermocouple _ instrument1

Thermocouple temperature measurement is the basic principle of two kinds of different ingredients of homogeneous conductor closed loop, when temperature gradient is at both ends, the loop will have an electric current passes through, the existed Seebeck electromotive force between two ends -- Thermoelectric emf, this is the so-called seebeck effect. Two different components of homogeneous conductor electrode as heat, the temperature is higher for work at the end of the end, one end of the low temperature as the free end, usually free end under a constant temperature. According to the thermoelectric emf as a function of temperature, the thermocouple indexing table; Indexing table is free end temperature at 0 ℃, under the condition of different thermocouples with different indexing table. Access in the thermocouple loop when the third metal material, the two contacts at the same temperature as long as the material, produced by the thermocouple thermoelectric is set to remain the same, which is not affected by the third metal access in the loop. When therefore, thermocouple temperature measurement, can be connected to the measuring instrument, measured after the thermoelectric emfs, can know the temperature of the measured medium. Thermocouple is the use of the material when the temperature changes, the resistance also along with the change of characteristics to measure temperature. When resistance changes, the work shows the temperature resistance of the meter. Thermocouple is a kind of temperature sensor, it is smaller than the diameter of a prefabricated thermocouple, flexible, good vibration resistance, suitable for installation in the case of prefabricated thermocouple can't install, WZPK thermocouple series adopts imported thermocouple temperature measuring element, therefore, is accurate, sensitive, quick thermal response time, stable quality, long service life, etc. Thermocouple protective mining have stainless steel, full of high-density oxide material inside insulation, therefore, thermocouple strong pollution resistance and mechanical strength, suitable for installation in harsh environment. Within the resistance external protecting tube of stainless steel, with high density grade metallurgical magnesia oxide material insulation, so it has a strong pollution resistance and excellent mechanical strength, suitable for installation in harsh environment. Thermocouple are usually made of platinum thermocouple temperature sensing element, install fixtures and wiring devices, such as main parts, such as thermal response time, reduce the dynamic error; Small diameter, the length of the restricted.