The precision of the bimetallic thermometer is divided into which a few level?

Bimetallic thermometer is a kind of low temperature field temperature measurement instrument. It can be directly measured various - in the process of production 50 ℃ ~ + 500 ℃ temperature range of liquid, steam and gas. It is widely used petrochemical, hvac equipment, industrial equipment, power plants, etc. 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. So the precision of the bimetallic thermometer is divided into which a few level? Bimetallic thermometer precision grade 1. 0 and 1. 5, 2, 2. 5, 4. Bimetallic thermometer precision grade is it permissible error of the dial scale value by it's percentage, its accuracy level the greater the number of permissible error of dial scale limit value is larger. Range, the greater the same precision level, it measured the absolute value of the temperature the greater the margin of error. For bimetallic thermometer precision grade is 1. Level 5 and 1. Level 0, respectively under normal use, the permissible error of the thermometer was the range & plusmn; 1. 5 and & plusmn; 1. 0%.