The difference between the axial bimetallic thermometer and mercury thermometer

The axial bimetallic thermometer, it is one of the bimetallic thermometer. The axial bimetallic thermometer and mercury thermometer what is the difference? We can to distinguish from two aspects. 1. The working principle; Bimetallic thermometer working principle is to round shape into threaded heat bimetallic strip as thermal devices, and put it 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. Spool at the free end is equipped with a pointer. When the temperature changes, the resulting thermal devices the free end of the rotation, drive the thin axis from the Angle of the pointer changes, corresponding temperature indicator on the dial. And the working principle of mercury thermometer is the mercury in the vacuole is affected by the temperature change volume expansion, obvious changes in the length of the tube of mercury, when the temperature reaches thermal equilibrium, the mercury is constant. 2. Using the environment; Type axial bimetallic thermometer is mainly used in industrial equipment, while mercury thermometer is used for home, Thermometer) 。