Bimetallic thermometer do the principle of temperature sensing element is what?

Bimetallic thermometer is a bimetallic strip as its thermal components, it also name & other; Bimetallic thermometer & throughout; , its working principle is to two different expansion coefficient of metal around into spiral, and in a protective sleeve tube, one end is fixed, known as the fixed end, the other end of the connection on a thin shaft, called the free end. Pointers and panel mounted on the spool at the free end. When the temperature changes, temperature sensing element resulting the free end of the turn, drive the thin axis from the Angle of the pointer changes, indicating the corresponding temperature on the panel. Elected bimetallic strip temperature sensing element, therefore, main is to use the temperature changes when the different expansion coefficient of expansion and contraction of bimetallic strip. Bimetallic thermometer temperature range is generally - 50 ~ 500 ℃, the commonly used precision level is 1. 0 s and 1 s. 5. Bimetallic thermometer and the rod of glass liquid thermometer USES similar, but it can be used under the condition of higher mechanical strength.