A bimetal thermometer is a field detection instrument that measures low to medium temperatures. The temperature of liquids, vapors and gaseous media in the range of -80°C to +500°C in various production processes can be directly measured. The main component of the industrial bimetal thermometer is a multi-layer metal sheet composed of two or more metal sheets stacked together, which works on the principle that two different metals expand to different degrees when the temperature changes. It is composed of bimetal sheets that are wound into a circular curved shape. When one end is heated and expanded, the pointer is rotated, and the working instrument displays the temperature value corresponding to the thermopower.