How to choose suitable for bimetallic thermometer accuracy?1

Bimetallic thermometer working principle is to 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. Bimetallic thermometer as a kind of measuring instruments, the precision of different bimetallic thermometer, within the scope of the provisions of measured values generally more accurate. So how to choose suitable for precision of bimetallic thermometer? In order to our common one. Level 5 and 1. To see a level 0. 1. The precision of level 0 is higher than 1. The precision of level 5. But we do not have necessary to each table 1 requires precision. Level 0. In everyday use, generally for 2 on the precision of the bimetallic thermometer. Level 0, the bimetallic thermometer precision of industrial use of 1. Level 5.