Description

The Bently Nevada 330880-16-00-075-00-02 belongs to the rugged PROXPAC XL Proximity Transducer Assembly series. This smart, self-contained hardware solution integrates a 3300 XL 8 mm proximity probe and its associated Proximitor sensor directly into a single, specialized thermoplastic housing. Consequently, this design eliminates the need for separate extension cables and external sensor enclosures on critical industrial assets like turbines, compressors, and large pumps.

Suffix Part Number Breakdown

The specific option strings map directly to the following structural specifications:

• 330880: Base Model Number for the PROXPAC XL Proximity Transducer Assembly.
• 16: 3300 XL 8 mm probe, standard configuration without specialized regional agency approvals.
• 00: No standoff adapter housing modification (B Dimension).
• 075: 7.5 inches probe penetration length (C Dimension).
• 00: No conduit fittings included (comes with two sealing plugs and two washers).
• 02: 3/4-14 NPT mounting thread option.

Hardware Specifications

Material Design and TSI Characteristics

The advanced housing consists of a high-strength Polyphenylene Sulfide (PPS) thermoplastic matrix embedded with glass fibers and conductive carbon filaments. Consequently, this engineering choice provides elite physical impact resistance while safely dissipating stray electrostatic charges in harsh environments.

Because the housing cover protects the integrated Proximitor sensor directly at the measurement point, it eliminates the need for an external extension cable loop. This design minimizes high-frequency radio frequency (RF) attenuation and removes the vulnerability of exposed ClickLoc connections inside harsh, oil-misted machinery enclosures. The assembly connects directly to field wiring terminal blocks, routing a clean analog voltage output to a remote 3500 monitoring rack.

Frequently Asked Questions

Q: When should an engineer use the 7.5-inch probe penetration option (-075) without a standoff adapter (-00)?

A: This long penetration setup works perfectly when the shaft target sits deep within a thick outer housing wall or machine bearing block. Because this model lacks a standoff adapter, the entire 7.5-inch stem inserts straight through the 3/4-14 NPT port to reach internal machine components.

Q: Can field technicians calibrate the internal Proximitor sensor inside this housing?

A: No. The internal 3300 XL electronics come factory-calibrated for standard AISI 4140 steel targets. Technicians only need to adjust the physical gap distance during installation to achieve the proper -10 VDC midpoint electrical bias.

Field Installation Guidelines

• Thread the 3/4-14 NPT base of the assembly into the pre-drilled machine housing port, ensuring tight engagement to maintain the case pressure boundary.
• Next, adjust the physical depth position until the probe tip establishes the recommended 1.27 mm (50 mils) mechanical gap relative to the shaft target.
• Subsequently, feed your field instrumentation wiring through the housing conduit entries directly into the internal terminal block connection points.
• After that, tighten the housing cap screws firmly to compress the integrated perimeter seal, ensuring the container satisfies IP66/Type 4X water-tight ratings.
• Finally, supply a stable negative DC power source (-24 VDC) to the unit, and verify that the initial un-gapped output voltage reads exactly at the calibration midpoint of -10 VDC.