Thermal resistance installation need to be aware of a problem1

Thermal resistance, is contact temperature measurement of the temperature measuring instrument, is one of the temperature sensor, and have high sensitivity, strong stability, compatibility and accuracy are better, and so on merits, make its application more widely in industry. But due to the influence of environment temperature instrument received is bigger, so the thermal resistance in the process of installation, need to pay attention to the following contents:

1, thermocouple and thermal resistance should have enough insert depth: with a protective casing thermal resistance of heat transfer and heat loss, in order to reduce the measurement error.

2, when the original measurement insertion depth of more than 1 m, shall be installed vertically, as far as possible or add racks and protect casing weighing sensor

3, for high temperature and high pressure and high velocity of temperature measurement, Such as main steam temperature) , in order to reduce cases of fluid resistance and prevent cases break under the action of a fluid, can take protecting tube shallow inserted way or use hot shell heat resistance. Shallow inserted type thermal resistance to protect casing, and its depth into the steam pipe should be no less than 75 mm; Shell hot resistance of the scale of the insertion depth of 100 mm;

4, if you need to measure is the temperature of flue gas, although the flue is 4 m in diameter, thermal resistor insertion depth of 1 m.

5, to measure the thermal resistance of pipe central fluid temperature, usually the measurement end is inserted into the pipe should be the central place, Vertical or inclined installation) 。 As the current body of pipe diameter is 200 mm, the thermal resistance should choose insert depth 100 mm;

thermal resistance installation note above 5 environmental problems, can effectively reduce the impact of environmental problems, reduce the occurrence of failure problems, ensure the accuracy of the measurement results.

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key words: thermal resistance, thermocouple, thermal resistance, platinum resistance, PT100, PT1000, pressure sensor and digital temperature sensor