Bimetallic thermometer accuracy level

Bimetallic thermometer can be directly measured in the process of various production - 80 ℃ ~ + 500 ℃ within the scope of liquid, steam and gas medium temperature. In industrial measurement, the accuracy of the often said with a precision instrument, precision measuring instrument is one of the important indicators of quality. Bimetallic thermometer precision grade based on its 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. 1. Level 5 and 1. Level 0 respectively under normal use, the the permissible error of the thermometer was range & plusmn; 1. 5 and & plusmn; 1. 0%. If the full range is 150 degrees, therefore, & plusmn; 1. 5%, permissible error for & plusmn; 2. 25 degrees, & plusmn; 1%, the error was & plusmn; 1. 5 degrees. Bimetallic thermometer is a 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.