How to select the thermocouple temperature measurement points

For the choice of the thermocouple temperature measurement point is very important, because the temperature measuring points on the location choice, for the whole production process, has the certain representativeness and typicality, otherwise will be of no control and measure. When the thermocouple was inserted into the temperature place, will be in the direction of the length along the sensor, produce a variety of different thermal current, and when the environment temperature is lower, the heat will lose, which results in the thermocouple temperature sensor and the object being measured, appear inconsistent and produce error in temperature. Because of heat conduction and appear error, therefore, basic it is and there is relationship between the depth of the insert, and the depth of the insert and protecting tube material also have relationship, because of the protection of the metal tube on the heat conduction performance is better, so will more deeply, in the depth of the insert and ceramic materials on the thermal insulation performance is better, so the insert can be lighter.

a, the temperature on the accuracy is very high, in the process of measuring temperature, because of the hot end of the thermocouple and the objects being measured, there will be a relatively good thermal contact occurs, and obtain higher measurement accuracy. Second, on the structure is very simple, so would be very convenient to maintenance, directly to the two different conductor, or is a welding, semiconductor and other parts of the protection of the insulation, when the whole thermal endpoint temperature field of welding, cold end connection between the poles and secondary instrument, this time can complete thermocouple temperature measurement device. Three, dynamic on the speed of response is faster, and the thermocouple on the hot side volume is small, so the heat capacity is small, so the dynamic corresponding speed will be faster.