Bimetallic thermometer inserted depth of how to choose a more appropriate?

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. It can be directly measured various - in the process of production 50℃- + 500 ℃ within the scope of liquid, steam and gas medium temperature. Is also very convenient to use, as long as inserted the heat pipe can be measured medium, thus it can be seen, the insert depth is very important, because if the insertion depth is not enough, will affect the measurement accuracy. How do we choose insert depth of the bimetallic thermometer? In fact, the factors influencing the bimetallic thermometer inserted depth of there are two. The first is the range of measuring temperature, because the measuring temperature range determines the double the length of the metal sensors ( Double metal sensors installed in the bottom of the heat pipe) 。 In general, from heat tube end, at least 50 mm, that is more than 50 mm length is ok. Second associated with installation of bimetallic thermometer, said pipe using bimetallic thermometer, for example, if the connection pipe installed on the base flange, etc. , or to count all the length of these parts. Considering the two factors above, we can choose a more suitable insertion depth of the bimetallic thermometer.