Thermocouple Protection Tubes are meant to protect the insulators and thermocouple element from the ambient environment. These can be used in very severe conditions. The tubes are used for performing the temperature measurement for gas turbine exhaust, diesel engines, kilns, and other industrial processes. Thermocouple Protection Tubes are also used in homes, businesses and offices. Some use these as the temperature sensors in thermostats, while some use the tubes as highly effective flame sensors that can be integrated into safety devices.