Bimetallic thermometer
The working principle of the bimetal thermometer is to use two metals with different temperature expansion coefficients, one end is welded at a fixed point, and the other end is twisted and deformed when the temperature changes, which is converted into the deflection angle of the pointer to indicate the temperature.
If there is a linearity error during use, the inaccurate temperature indication can be adjusted by adjusting the pointer knob behind the thermometer, and the adjusted thermometer can be used only after it has passed the calibration.
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