Thermocouple temperature measurement conditions and the advantage is what? Release date: 2019 03 - 14 reading times: zero

Thermocouple belongs to the thermal components, can directly measure the temperature, the closed circuit is made up by two different materials, different because the materials, so the electron density would be different, and different electron density can cause electronic diffusion, wait for after stable equilibrium production potential. When both ends of the gradient of temperature, creates an electric current in circuit and thermoelectric emfs, the greater the difference of temperature, the greater the current will, when measure the thermoelectric emfs can know temperature, thermocouple is actually a kind of converting thermal energy into electrical energy converter. Thermocouple temperature measurement range, measurement accuracy is high, performance is stable, and the analyte in the thermocouple and contact time is not affected by the intermediate medium, the thermal response time soon, to respond to changes in temperature is very flexible, from - 40 ~ + 1600 ℃ can be continuous testing temperature, the device is simple and good intensity, long service life analysis characteristics and advantage of thermocouple each index number believe we all know, thermocouple index number can be classified into several kinds of metal, thermocouple, there is also a cheap metal thermocouple. Small make up to you to the next degree, simple component types. S index number: particularly strong antioxidant, precision is the highest, comparison was used as a standard thermocouple. R index number: # and S dividing many performance is basically the same, just electromotive force will be 15% larger than the S or so. B dividing number: can be used under the condition of oxidation, also can be used under vacuum conditions in a short time, but its electromotive force under the room temperature is very small. N index number: resistance to low temperature resistance to radiation, thermoelectric emfs is stable, strong antioxidant capacity also. K index number: antioxidant is very strong, under the condition of oxidation can continue to use, wide use range. E index number: sensitivity is very high, can continue to use in the oxidizing atmosphere. J index number: not only can use in oxidizing atmosphere and reducing atmosphere, also compare to corrosion. T index number: belong to inexpensive metal thermocouple accuracy for the best.