Abstract: A door assembly for use with a furnace having a furnace wall and a door opening through the furnace wall. The door assembly includes a ceramic body with at least one aperture therethrough and a metal door facing secured to the ceramic body, the metal door facing having an aperture in register with the bore in the body. At least one of a peep hole assembly or a probe assembly is connected to the door assembly such that the interior of the furnace can be viewed through the peep hole assembly or the probe can be exposed to internal conditions in the furnace.

Abstract: A mounting apparatus for a temperature sensor assembly for sensing skin temperature of a tubular member which has a ceramic collar in surrounding relationship to the tubular member, the collar having a throughbore. There is a metallic mount removably secured to the collar which has an opening in register with the throughbore in the collar. The mount includes a connector for attaching to a temperature sensor assembly.