Protection sheaths are materials used to shield temperature sensor from attack or damage. They are often made from either metal or ceramic depending on the application where the temperature sensor is going to be used. There are many different protection sheath materials available that are suited to different applications and environments. You can view a wide variety of protection sheath material datasheets here. As well as material types, how the protection sheath is designed can help protect the temperature sensor. View a range of protection sheath designs here.
Metal protection sheaths
Ceramic Protection Sheaths