Mechanical thermometer is how to accurately measure the temperature?

Mechanical thermometer thermometer is everybody often can be used daily, but among industries, and according to industrial demand and characteristics of thermometer is made and be become, one of which is mechanical thermometer. And introduce today is mechanical thermometer is how to achieve accurate measurement of temperature? Mechanical thermometer measurement range is wide, suitable for measuring large difference of the temperature difference between two kinds of temperature, high temperature can be measured, can also be used to measure the temperature. So how are mechanical thermometer temperature measurement? Mainly for the production of the thermometer and working principle. Mechanical thermometer with different expansion coefficient of two kinds of metals ( Or alloy) Piece together form a thermal components, generally made spiral wound, its one end fixed and the other end ( The free end) Equipped with a pointer. When the temperature changes, the thermal component of curvature change, free end rotation, drive the pointer indicates the temperature value on the dial.