WSS bimetal thermometer is usually by around a spiral shaped temperature sensing element - double metal piece, connecting rod, a pointer shaft, indicator member and a protective tube. WSS bimetal thermometer main dimension series and installation fixing device, which comprises a protective tube diameter, insertion length, thread installation size, in order to achieve universal and swap, as far as possible with the thermal resistance, thermocouple agree.
The basic error test method of pressure type thermometer and WSS double metal thermometer is the same as the method of thermal resistance and thermocouple error test. WSS double metal thermometer should be at the same time and poor reproducibility test. In each of the tested temperature points, the difference between the thermometer and the reverse stroke is called the back and forth, and the difference should not be greater than the absolute value of the basic error. In each is examination of the temperature, indication of a thermometer with a stroke, the indication of the maximum difference, namely for reproducibility, the difference should not exceed the allowable error of the absolute value of 1 / 2.
With the improvement of the degree of automation, the application of WSS bimetallic thermometer will be more and more extensive in the petroleum, chemical, power station, food, machinery, printing and other industries.
