Bimetallic thermometer two ways of measuring temperature contrast

Bimetallic thermometer is a kind of common measuring instruments and meters, its temperature measurement method has two kinds, one kind is to have sex with another war war length method of temperature measurement. Sex war peace not war temperature measurement of the measurement methods and their principle is the same, both temperature measuring method the advantages and disadvantages of the difference. Then the two temperature measuring method, a difference between what? Here are specific talk about: war temperature measurement to measure the value of the accurate, however, he must fight with medium will corruption by the media, another kind of temperature measurement was not medium corrupt but measuring accuracy is not very accurate. However, it can measure the temperature of the lower limit is high, used for measuring temperature of low temperature object name. A has a smaller thermal capacity and characteristic war bimetallic thermometer to measure objects, have difficulty in measuring moving objects, and can measure the temperature of any part; Easy to meet a multipoint measurement. A war method that measured temperature field of medium temperature does not change, can measure the temperature of the moving objects, ferial measurement in the name of the temperature. Second, the echo rate war bimetallic thermometer method in normal times slower, about 1 to 3 minutes. The fighting method in normal times faster, about 2 ~ 3 seconds, even slowly for 10 seconds. Three, measuring the premise bimetallic thermometer method of temperature measuring element war to fight with the tools to be measured is good; Temperature measuring element war don't make the temperature of the tested tools produce change. Radiant energy, the fighting method by measuring tool was recovered enough to shine to the detecting element; Invalid emissivity to accurately measured tool, may exist the possibility of a return. Four, precision bimetallic thermometer fighting method is 0. 5% ~ 1%, according to the measurement of the premise can reach 0. 01% of war method for daily below 20 ℃, if good can reach 5 ~ 10 ℃. From above several aspects to introduce double metal thermometer temperature measuring method of contrast, in the use of bimetallic thermometer can be used as a reference.