When selecting the model of industrial thermocouple, attention should be paid to the following aspects: the nature and state of the measured object, the selection of the moving object, the temperature measurement of the vibration object and high-pressure vessel, the protection tube is needed in the chemical polluted environment, and the insulation requirement is higher in the case of electric gas interference.
The choice of durability and thermal response thermocouple with large diameter has good durability, but the response speed is slow. For the thermocouple with large heat capacity, the response speed is very slow, and the measurement speed is also very slow. When the temperature is high, the temperature control is poor in the case of temperature control. It requires fast response time and a certain degree of durability. Armored thermocouple is more suitable.
S-type, B-type and K-type thermocouples are suitable for strong oxidizing and weak reducing atmospheres, while J-type and T-type thermocouples are suitable for weak oxidizing and reducing atmospheres. If a protective tube with better air tightness is used, the requirements for atmosphere are not strict. The selection of measurement accuracy and temperature measurement range is generally used when the temperature is between 1300? 1800 ° C and the accuracy is high The accuracy is not high and atmosphere is needed.
It also allows the use of tungsten rhodium thermocouples. Tungsten hen thermocouples are usually used above 1800 ° C. High precision S-type and n-type thermocouples are available at 1000-1300 ° C. Type K is usually used below 1000 ° C. Thermocouples and n-type thermocouples usually use E-type thermocouples below 400 ° C. T-type couple is usually used for 250 ° C and negative temperature measurement.
On 2018-08-08 11:45:46
