Sealed temperature probe

摘要

A temperature probe has a metal casing, closed at one end and open at its other, in which a temperature sensor is buried in compacted hygroscopic mineral insulation having an exposed end face through which extend wires from the sensor. Such end face is sealed to keep it dry by a metal tube having one end surrounding and brazed to the metal casing, and plugged at its other end by a body of compressed sealant material. Lead wires extend through the sealant body and are electrically joined in a space provided between the exposed end face of mineral insulation and the opposing inner end face of the sealant plug.