Radial bimetallic thermometer is the mercury?1

Radial bimetallic thermometer, also known as the radial bimetallic thermometer, it is one of the bimetallic thermometer. The radial 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 diameter, called the free end. On the free end line diameter is equipped with a pointer. When the temperature changes, the resulting thermal devices the free end of the rotation, drive the change from the Angle of the pointer to the fine diameter, corresponding temperature indicator on the dial. Thus, the radial bimetallic thermometer is not mercury. 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 material, created out of the mercury thermometer.