How to choose suitable for bimetallic thermometer accuracy?

Bimetallic thermometer is mainly used to measure the - Medium temperature field instruments 50 to 500 degrees, it is because of its cost-effective, got the favour of all walks of life. But, due to the different industry is different to the requirement of the precision of the bimetallic thermometer. So how do we choose suitable for precision of bimetallic thermometer? We all know that the principle of the bimetallic thermometer is 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. Thus the heat element will affect the precision of the bimetallic thermometer. Therefore, we need according to the environment of use to think the precision of the bimetallic thermometer. In normal use, the precision of the bimetallic thermometer is 2%, general family expenses industrial bimetallic thermometer is 1 in general. 5%. Bimetallic thermometer on the part of precision industrial equipment accuracy can reach 1%.