Bimetallic thermometer thermometer factory group two kinds of measurement error

Thermometer factory group bimetallic thermometer is the thermal resistance and thermocouple signal remote transmission function and the combination of bimetallic thermometer indicator for in situ, it can meet the demand of field temperature, also can satisfy the need of long-distance transmission, bimetallic thermometer can directly measure various - in the process of production 40 ~ + 600 ℃ within the scope of liquid, vapour and gas medium, as well as temperature measurement of solid surface. Bimetallic thermometer thermometer factory group performance characteristics: 1, with a small temperature measuring probe, high sensitivity, linear scale, long service life, etc. 2, has far transfer resistance signal ( 装PT100) , temperature controller, shock resistance, corrosion resistance and high power switch signal and other functions. 3, the structure form is the same with the international similar products, can replace imported. Bimetallic thermometer thermometer factory group of two kinds of measurement error: 1, high temperature range bimetallic thermometer temperature range is 200 ~ 650 ℃ ( Baidu encyclopedia is explicitly specify) To allow errors 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 in the related information clear records: 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℃( If you need low temperature, if you don't need, we usually will mark to the limit of temperature 0 ℃ to customers, users are sometimes used - party in Beijing area 40 ℃, this is can do, but in - Under the condition of 40 ℃ to consider whether to accept this error.