Abstract: A retractable thermowell is formed of a fixed thermowell housing on which a movable thermowell housing is threaded. The fixed thermowell housing and the movable thermowell housing together receive a thermowell. The thermowell is secured for axial movement with the movable thermowell housing. When the movable thermowell housing is threaded onto or off the fixed thermowell housing, the movable thermowell housing is moved between respectively an extended and retracted position.

Abstract: A temperature sensor assembly has an explosion proof termination head body having a cap end, a conduit side and a process end, a conduit connection on the conduit side, a cap threaded onto the cap end; and a terminal block attached to the termination head body with a probe extending from the terminal block through a close tolerance opening in the process end. A terminal block is spring fastened to the termination head body to permit the probe limited axial movement within the close tolerance opening. The process end has a threaded opening in the termination head body, a fitting threaded into the threaded opening in the termination head body; and the close tolerance opening passes through the fitting.

Abstract: A thermocouple connector for measuring the temperature of a surface includes a heat conductive casing having a hollow interior and a linear ridge on one side. The apex of the linear ridge forms a contact zone with the surface. A pair of thermocouple leads extends into the hollow interior of the casing, and are attached to the casing at and parallel to the linear ridge. The contact zone is sufficiently wide in relation to the distance of the contact zone from the leads such that welds along the side of the contact zone penetrate the contact zone, but do not penetrate so far as to burn the leads.