The replaceable element Heat-Tracing thermocouple assemblies are made for use in systems that measure the surface temperature of process pipe that is carrying products whose temperatures must be controlled to prevent freeze-up, or to maintain a viscosity level so that the inner medium will flow. The RHT thermocouple assembly allows the sensing element to be easily removed and replaced without removing insulation, or disassembling the sensor from the piping system. These assemblies are offered in a variety of calibration types and are supplied with fiberglass insulated conductors, a 316SS sheath, and a 3/4" radius stainless steel mounting pad.