The axial bimetallic thermometer is the mercury?

Axial bimetallic thermometer, also known as axial bimetallic thermometer, it is one of the bimetallic thermometer. The axial bimetallic thermometer is the mercury? We can distinguish from its working principle, working principle of bimetallic thermometer is around into threaded type thermal 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. Thus, the axial bimetallic thermometer is not mercury. The mercury thermometer is commonly used in glass rod, glass rod thermometer so also known as the mercury thermometer, mercury thermometer is in the world of the Galileo invented the first, on the basis of a thermometer, established in 1714 by the Dutch warren hite with mercury as temperature measurement, made out of the mercury thermometer.