Bimetallic thermometerThe temperature sensing element is composed of two layers of metal sheets with relatively large differences in linear expansion coefficients, which are stacked and welded together. One end of the element is fixed, while the other end is free. When the temperature changes, due to the different materials of the bimetallic sheets, the coefficient of linear expansion varies greatly, resulting in different expansion and contraction, causing the bimetallic sheets to bend and deform. The pointer is driven by the transmission mechanism at the free end, indicating the temperature on the dial.
Bimetallic thermometerAccording to the direction of connection between the pointer disk and the protective tube, they can be divided into the following categories:
1. Axial bimetallic thermometer, with pointer plate and protective tube vertically connected;
2. Radial bimetallic thermometer, with parallel connection of pointer disk and protective tube;
3. 135 ° directional bimetallic thermometer, with pointer plate and protective tube connected at a 135 ° angle;
4. Universal bimetallic thermometer, with adjustable pointer dial and protective tube at any angle.
5. Installation form of bimetallic thermometer: usually threaded, flange type, without fixed device, etc.
Bimetallic thermometerThere are two types of temperature sensing elements: planar spiral and linear spiral. The temperature measurement range is -80~600 ℃, with an accuracy level of about 1.5.
Bimetallic thermometerGood seismic resistance, small size, fast response speed, good linearity, high stability, and some products can also work at high temperatures.
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