Turn the thermometer works?

Want to understand the principle of rotation type thermometer, first we need to figure out what is turn the thermometer, in fact, turn the thermometer, pointer thermometer and bimetallic thermometer is a different way of saying the same thing. Its working principle is based on the principle of solid heat expansion, the two pieces of expansion coefficient difference is very big pieces of metal welded together. When the temperature changes, the difference is very big, caused the different expansion coefficient of expansion and contraction, the deformation of sheet metal bending. According to different deformation and produce different momentum, momentum to drive the connection shaft and the other end of the indicating needle, indicate the temperature. Understand the working principle of rotating type thermometer, we can know where I can use it. Since it is a measuring instruments, the use of the correct and timely cleaning is necessary, also need to detect its measure, on a regular basis to ensure the accuracy of the measured value.