Factors affecting thermocouple response time

The factors affecting the response time of the thermocouple are as follows:

1. The response time also varies with the working state, that is to say, the thermocouple of the same structure has different response times under different heat exchange conditions.

2. The structure and size of the thermocouple. The thicker the diameter of the hot electrode and the protective tube, the greater the inertia; the thicker the wall, the greater the inertia. Thus, the longer the thermocouple is stabilized, the longer the response time.

3. When the temperature changes stepwise, the time required for the output of the thermocouple to change to a specified percentage corresponding to the step change is called the thermal response time of the thermocouple, and is usually expressed by T.

4, different materials, thermal conductivity is also different. For example, the metal protection tube has better heat conduction than the porcelain protection tube, the thermal inertia is small, and the thermocouple is stable for a short period of time, that is, the response time is short.