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A resistance temperature detector (RTD) operates on the principle that a change in the temperature of a metal causes a corresponding change in that metal’s electrical resistance. The resistance of the RTD increases as the temperature rises. SOR can provide a replacement for any failed thermocouple, RTD, or temperature assembly.

In most process applications the temperature sensor is inserted into a thermowell or protection tube. This protects the sensor from its environment and facilitates easy maintenance. These assemblies generally consist of a head, nipple-union-nipple, and thermowell.

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