Bimetallic thermometer 2 applications use erroneous zone

Bimetallic thermometer is hangzhou bimetallic thermometer manufacturers instrument co. , LTD. , one of the main thermometer products, our company is also a bimetallic thermometer manufacturers, design and manufacture bimetallic thermometer, the high quality of the products are well received by the masses of customers, in the life, work, help is quite big. Bimetallic thermometer is when the bimetallic strip feel the temperature change, Pointers can be on a circular dividing scale to indicate the temperature, can be directly read data, very intuitive and convenient. Therefore, the application range of the bimetallic thermometer is very extensive, bimetallic thermometer used with all kinds of outdoor environment, with liquid damping, temperature detecting element can be bent. In petroleum, chemical, machinery, shipbuilding and other fields. But need to pay attention to in the application of double metal error, so as not to affect the accuracy of the measurement results. Then we have to get to know the application of the bimetallic thermometer myth.

1, the high temperature range: bimetallic thermometer temperature range is 200 ~ 650 ℃, permissible error are about 1% of the scale range. In fact this is wrong, because, this made of metal spiral roll shape of thermal conductivity sensor, under the condition of 650 ℃ high temperature fatigue, temperature difference is very big, so when the temperature exceeds 550 ℃, should consider the thermocouple is used to solve this problem. 2, the lowest temperature range: bimetallic thermometer temperature range is 200 ~ 650 ℃ ( This is not correct) , the minimum temperature should be detectable 40℃。 In fact this is not much, because, bimetallic thermometer in - usually a kind of temperature calibration in production 20℃。