How to determine the unknown thermocouple type?

How to determine the unknown thermocouple type?

1。 Measurement precision and temperature measurement in the field of selection using the temperature at 1300 ~ 1800 ℃, the request precision is high, and compare common choose B type thermocouple; The request precision is not high, atmosphere and allow agreed to the use of tungsten-rhenium thermocouples, higher than 1800 ℃ the ordinary choose tungsten-rhenium thermocouples; Using the temperature at 1000 ~ 1300 ℃ accuracy request high availability and compare the S type thermocouple and N type thermocouple; Under 1000 ℃ average with K type thermocouple and N type thermocouple, below 400 ℃ average E type thermocouple; Under 250 ℃ and negative common use T thermocouple temperature measurement, in T thermocouple stable at high temperature and high precision.

2。 Durability and echo of hot wire diameter of sexual selection of thermocouple good durability, but echo is a little slow, about the heat capacity of thermocouple, echo is slow, measure the gradient of temperature, under the condition of temperature control, temperature control is poor. Request echo time fast and durability of the request has the certain choice armoured accidentally analogy is appropriate.

3。 The choice of using atmosphere S, type B, type K thermocouple right in strong oxidation and the weak recovery in atmosphere, J type and T type thermocouple is suitable in weak oxidizing atmosphere and recovery, if use air tightness match good maintenance tube, the atmosphere of the request is not too strict.

4。 The nature of the measured object and form of thermocouple http://www. wuxiyibiao。 Com/choice movement object, vibration, temperature measurement request high mechanical strength, high pressure vessel has the atmosphere of chemical purification request maintenance tube, with high electrical trouble request under the condition of the insulation match.

selection process: model - - Index number - Explosion-proof grade - Precision grade - Device fixed way - Maintenance of tube material - Pull out length or depth