To protect a sensor, like an RTD, from direct contact with the process stream, it is placed in a ______."

To protect a sensor, like an RTD, from direct contact with the process stream, it is placed in a "thermowell." A thermowell is a protective tube that allows the sensor to measure temperature while being shielded from harsh process conditions. Update (2024-10-31): To protect a sensor, like an RTD, from direct contact with the process stream, it is placed in a **thermowell**.