Bimetallic thermometer WSS - 401 what does that mean

Bimetallic thermometer WSS - 401 has been widely used in industry, it is measured in the field of low temperature testing instrument. This kind of bimetallic thermometer can be directly measured in the process of various production - 80 ℃ ~ + 500 ℃ within the scope of liquid, steam and gas medium temperature. Bimetallic thermometer WSS - Diameter of 100 mm, 401:4, on behalf of the dial 0 (axial type, 1 on behalf of the movable nipple. Bimetallic thermometer WSS - The principle structure of 401 is around into threaded 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.