Description

The Bently Nevada 330880-28-40-058-01-02 belongs to the rugged PROXPAC XL Proximity Transducer Assembly series. Unlike separate proximity probes that require intermediate extension cables, this clever system acts as a completely self-contained solution. It integrates a 3300 XL 8 mm proximity probe and its associated Proximitor sensor directly into a single, specialized thermoplastic housing.

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.
• 28: 3300 XL 8 mm probe with Multiple Approvals.
• 40: 40 mm Standoff Adapter length option.
• 058: 58 mm Probe Penetration length (Dimension C).
• 01: One M25 cable fitting configuration (includes two plugs).
• 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.

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 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: How does the “28” option change hazardous area compliance for this model?

A: The “28” option specifies that the internal 3300 XL 8 mm probe carries factory-certified Multiple Approvals (such as ATEX, IECEx, and CSA certifications). This enables safer deployment across explosive process environments when paired with approved intrinsic safety barriers.

Q: What is the main structural purpose of the 40 mm standoff adapter (-40 option)?

A: The 40 mm standoff adapter provides a precise physical offset from the machine’s outer casing wall. This allows operators to fine-tune the exact penetration depth of the probe tip relative to internal target surfaces without modifying the machine casing.

Field Installation Guidelines

• Thread the main 3/4-14 NPT base into the pre-drilled machine housing port, ensuring a tight seal to maintain the case pressure boundary.
• Next, adjust the probe sleeve location 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 M25 cable fitting hole 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 to the unit, and verify that the initial un-gapped output voltage reads exactly at the calibration midpoint of -10 VDC.