The bimetallic thermometer compensation method and the usage of protecting tube

Bimetallic thermometer is a kind of temperature measurement in the field of low temperature meter, can be directly measured in the process of various production - 50℃- Liquid + 500 ℃ range steam and gas medium temperature. When the thermometer is when the environment temperature changes, ordering and capillary liquid within the corresponding expansion or contraction, the indication error is then generated. The following two kinds of compensation method can compensate the error. 1, double metal compensation: ( 1) Measure the actual temperature ( 2) Is suitable for measuring ambient temperature, indicator and lead the surrounding environment temperature change consistent. 2, catheter compensation: suitable for indicator and wire surrounding environment temperature change (independently 1) Indicator of temperature change is very small, around and around the conductor temperature change is large, and vice versa ( 2) Various parts of the wire under different ambient temperature ( 3) Part of the wire is heated in addition to the condition, if the bimetallic thermometer protecting tube protecting tube should be used to protect heat department: * with anti corrosive fluid, it is necessary to use appropriate material made of protecting tube. * if there is a high pressure, it is necessary to use to adapt to the working pressure of protecting tube. * if the fluid flowing, it is necessary to use appropriate flow rate and flow protection tube. * if draw temperature timing fluid leakage, it is necessary to use the protection tube. * if the filling liquid leakage from the sensor inside the thermometer, it is necessary to use protection tube.