Thermocouples are inserted into which type of protective device?

Thermocouples are commonly inserted into thermowells to provide accurate temperature measurements while ensuring protection from the process environment. A thermowell is a specialized fitting designed to house the thermocouple, allowing temperature sensing without direct exposure to the media being measured. This design helps to shield the thermocouple from potential physical damage, corrosive substances, and pressure changes, all of which could compromise the accuracy of the temperature readings or damage the sensor itself.

Additionally, the thermowell can be made from various materials that can withstand high temperatures or corrosive conditions, making it suitable for a wide range of applications in industrial settings. This provides a reliable and effective means of measuring temperature while maintaining the integrity of both the thermocouple and the process system.