Method and apparatus for selectively sealing and securing a sensor of a sealing plug to a part

An adapter-retainer for selectively securing and sealing one of a sealing plug and a sensor in an opening in a first part, comprising:

• a retainer bushing on said first part, having an inner end sealed relative to the opening, and an outer end with attaching means thereon, said retainer bushing having an axial passage extending therethrough and having means defining an axially facing annular sealing surface;
• said sealing plug and sensor each having an annular flange thereon, said annular flange overlying the sealing surface when a respective one of the sealing plug and the sensor is inserted into the retainer bushing and against the sealing surface;
• and
• a retainer cap engaged on the retainer bushing to secure and seal one of the sealing plug and the sensor to the retainer bushing, said retainer cap having releasable attaching means thereon complemental to the attaching means on the retainer bushing for releasably attaching the retainer cap to the retainer bushing, and having a clamping surface which engages the annular flange on the respective sealing plug or sensor when it is installed to clamp it between the retainer cap and the sealing bushing, whereby said adapter-retainer enables quick and easy assembly and replacement of a sealing plug or sensor to the first part in a fluid-tight and secure manner.