We are often asked about the responsiveness of sheathed mineral insulated Thermocouples.
Here are some important terms and factors to know...
Here are some important terms and factors to know...
Time Constant
When researching the responsiveness of a thermocouple you will most often see it expressed as a Time Constant. The Time Constant of a thermocouple is defined as the time required for the sensor to respond to 63.2% of its total output signal when subjected to a step change in temperature.
Response Time
The Time Constant of a thermocouple is not the same as the Response Time. When someone wants to know the Response Time of a thermocouple, they really want to know how long it takes the thermocouple to reach its full output. Five Time Constants are required for the thermocouple to respond to 99.3% of the total step change temperature.
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