Common pointer thermometer mercury?

Bimetallic thermometer is often visible in our lives, it can also be called a pointer thermometer. 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. Thus, common pointer is not mercury thermometer. The advantage of this type of pointer thermometer is the scene display temperature, intuitive and convenient, safe and reliable, long service life and fast reading. Using such temperature time should pay attention to clean and check in time, and regularly test the measured value. According to the meter and the connection mode of the heat pipe, this kind of thermometer can be divided into radial, axial and universal type three, so as to meet the needs of a variety of installation environment. In addition, in order to meet the characteristics of different devices, parameters such as heat pipe length and the teeth can also be customized according to customer requirement.