Bimetal thermometers use two metals with different temperature expansion coefficients wound in a helical shape and indicate the temperature by transmitting the deflection of the metal by temperature change to a pointer.
- Error due to ambient temperature is smaller than that of the filled type.
- Since there is no filled liquid, it is safe. (No pollution)
- Simple design and reasonable price.
- When selecting a thermometer, select one which is normally used within a temperature range of 75% or less. Check to confirm that the material of the wetted parts is appropriate for the gas or liquid to be measured.