RW Industrial RTD duplex assemblies feature sheathed MgO mineral insulated -328 to 1200°F (-200 to 650°C) and are designed to mate with a thermowell.  Typical assemblies include a spring loaded feature to ensure contact with the well bottom.  Nipples and a pipe union and are mated with connection heads to protect the sensor from dirt and moisture. These assemblies allow for replacement of the RTD while the wells are in place.  Probes are available in 100Ω DIN 0.00385 Class A +/- .15°C @ 0°C or Class B +/- .30°C @ 0°C, .188” or .250” diameters.