The ultrasonic level transducer shall be mounted to facilitate a clear pathway for an emitted conical beam to travel without interference or reflectance from the wetwell wall, piping, access ladder, guide-rail, or any other possible means of obstruction.

The transducer shall be rigidly mounted to a fixed stainless steel bracket that provides ease of access for maintenance and/or replacement. Electrical wiring from the transducer shall be housed in a three-quarter-inch liquid-tight flexible conduit not to exceed three feet in length. The electrical wiring shall then continue in three-quarter-inch PVC coated rigid galvanized steel conduit through the wetwell wall with water-tight sealed penetration to a minimum depth below grade of 18 inches until terminated in a pedestal mounted instrumentation enclosure cabinet.

The mounting height of the transducer shall be at a distance where full coverage of the highest and lowest wetwell alarm levels can be accurately attained. (Design Guideline DG-08 § 16.6, dated August 2006)