Using bimetallic temperature time to pay attention to the measurement range

Bimetallic thermometer is mainly used for measuring gas and liquid temperature of low temperature place, it is the working principle of metal heat bilges cold shrink, solved the temperature in the process of temperature measurement accuracy, in order to make the improve sensitivity, so the spiral sheet metal make it, when the temperature change of the multilayer metal plates, the layers of metal expansion or contraction, makes the spiral volume contraction or relaxation. After understanding the working principle of double metal thermometer, need more attention in the use of its measurement range. If you choose to not appropriate, will cause the lower precision, so as to reach its application performance indicators, and even damage the thermometer. It has two main range, respectively is the low temperature range and high temperature range, let us to know the detail. 1, low temperature range according to the baidu encyclopedia can learn bimetallic thermometer to measure the temperature in - Between 80 ℃ to 600 ℃, in fact, we usually only used to - 40℃。 Usually 0 - 100℃，0- 2, high temperature 150 ℃ range of bimetallic thermometer to measure the highest temperature is 600 ℃, but in actual use process, because the metal is made spiral roll shape of thermal conductivity sensor, under the condition of the high temperature of 600 ℃ is very easy to fatigue, temperature difference is very big, so when the temperature exceeds 550 ℃, you should consider using thermocouple as the temperature measuring tool.