Combined temperature and pressure transducer incorporating connector keyway alignment and an alignment method

A transducer assembly for monitoring a condition in the hollow of a vessel, said hollow containing a medium whose condition is to be monitored, said vessel having surrounding walls defining said hollow, comprising:

• a first vessel wall having an aperture for accommodating a transducer housing, said aperture communicating with said hollow, said aperture having a threaded portion and a keyway alignment portion for accommodating a projecting pin on a transducer housing,
• a transducer having a housing, said housing having an internal hollow, said housing disposed about a central axis, with a front portion of said housing adapted for insertion into said vessel aperture to position said front surface of said first portion in said hollow, said front housing portion extending into a second larger housing portion, said second housing portion having a connector coupled thereto, said connector having a plurality of terminals,
• a sensor located within said hollow of said housing and having terminals connected to said connector terminals,
• a sliding nut positioned about said second housing portion, said nut having a threaded section for coacting with said threaded portion of said vessel aperture, said nut capable of sliding on said front portion within a predetermined distance,
• an alignment pin extending from said housing and positioned in a predetermined orientation with respect to said housing connector, said pin adapted to coact with said key alignment portion of said vessel aperture whereby when said transducer housing is inserted into said vessel aperture with said alignment pin being accommodated within said keyway alignment portion, said transducer housing connector is always in a preferred orientation with respect to said alignment pin, with said preferred orientation selected to accommodate an external connector to assure that said external connector will always coact with said transducer housing connector, said sliding nut operative to firmly position said transducer housing in said vessel aperture by coacting with said threaded portion of said aperture.