How do you determine the range of the bimetallic thermometer?

Bimetallic thermometer is widely applied in many areas of our lives, but its working principle are basically the same, most is the heat element is composed of two layers of linear expansion coefficient difference is relatively large pieces of metal welded together, one end of the element as the fixed end, on the other side of the free end. When the temperature changes, because the bimetallic strip of material is different, linear expansion coefficient of relatively large differences, and produce different expansion and contraction, leading to the curving deformation of bimetallic strip, equipped with actuator (at the free end Dial pointer and temperature) So that it can directly show the temperature value. According to different usage environment, the bimetallic thermometer temperature range is also different. So how to choose the range of bimetallic thermometer? Range of the bimetallic thermometer temperature measurement range, it is according to the process of medium temperature range to choose, the most ideal situation is normal temperature indicator in the center of the dial, the measured temperature range for three times, but in reality bimetallic thermometer is essentially multiples of 50 degrees, therefore when choosing when to use the most close to the range of the thermometer.