Index value of the bimetallic thermometer

Index value of the bimetallic thermometer is refers to the adjacent two scribed line ( Each small cells) Said temperature, record dividing value also should have unit Celsius ( ℃) And Fahrenheit ( ℉) , in order to measurement accuracy, we commonly used index value of the bimetallic thermometer is 1 ℃ or 2 ℃, large temperature range interval is usually 5 ℃ and 10 ℃. Celsius ( ℃) And Fahrenheit ( ℉) The conversion relationship between the: F = 9 ℃ / 5 + 32, or 5 ℃ = ( F - 32) / 9 degrees Celsius; Bimetallic thermometer + = 32 degrees Fahrenheit 9/5 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.