Affect the factor of thermocouple response time?

1, the structure, size of thermocouple. Hot electrode, the diameter of the protecting tube more thick, the greater the inertia; The greater the tube wall thickness, inertia also. The interval of reaching stability state of the thermocouple is long, the response time is long.

2, different materials, heat conduction performance is also different. Such as metal protection tube is better than ceramic protection tube thermal conductivity, thermal inertia small, the interval of reaching stability state of thermocouple is short, short response time.

3, response time, also along with the change of working condition is different, that is to say the same of the structure of the thermocouple, under the condition of different heat exchange, the response time is different.

there was a step change in temperature, thermocouple output changes to correspond to the step change in the time needed for a prescribed percentage referred to as the thermocouple, thermal response time, usually by T.