What Are Ceramic Protection Sheaths?

Ceramic protection sheaths are a ceramic tube covering, often made from technical ceramics such as aluminous porcelain and recrystallised alumina, used to shield a temperature sensor from the environment they are immersed in. They are generally used in temperature sensors at very high temperatures from between 1000 to 1750°C. Some ceramic protection sheaths provide a very high electrical resistance so may be suitable for high voltage applications.

For applications where ceramic protection isn’t suitable, metal protection sheaths can be used up to limited temperatures.

Ceramic protection sheath