Do you know about the precision of the bimetallic thermometer?

Bimetallic thermometer is a kind of measurement in the field of low temperature test instrument. Bimetallic thermometer can be directly measured in the process of various production - 80 ℃ ~ + 500 ℃ within the scope of liquid, steam and gas medium temperature. Bimetallic thermometer temperature precision refers to the measurement or display the temperature differences of the minimum value, one is the precision of measurement point temperature parameters. 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. The precision of the bimetallic thermometer used in industry in general is 1. 0 s and 1 s. 5, the accuracy of the thermometer is generally 2. 0. Bimetallic thermometer 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.