What role does the bimetallic sheath?

Bimetallic thermometer is widely used in industrial equipment, we can often see that matchs with bimetallic thermometer using bimetallic thermometer sheath. So what's the bimetallic sheath for? Bimetallic thermometer protecting casing is set outside temperature measuring element, can also be pre-installed in the inconvenience of disassembly device with pressure, resist the measurement medium pressure and corrosion effect, make the bimetallic thermometer and so on instrument can work normally. So-called bimetallic thermometer protect casing, just as its name implies is to protect the thermometer. With explosive, corrosive, high temperature and high pressure, easy to burn the measurement of risk factors, such as medium, the thermometer can not directly contact, then the effect of protecting tube are evident. In order to protect the inside of the temperature measuring element, is convenient to repair. If the material is corrosive, high temperature, high pressure, easy explosion risk factors such as, easy to burn, you must add protection casing. Also is the first in a pipe or container welding screw type or flange installation casing pipe installation, install the bimetallic thermometer in again. If the measurement is the conventional material such as air, inert gas or water, there is no need to protect casing, directly installed on the joint line, you can also save money. Through more than a simple narrative, we understand the bimetallic thermometer protect casing for the role of the bimetallic thermometer is very big, can protect the inside of the temperature measuring element, if the bimetallic thermometer is broken, is very convenient for maintenance.