Bently Nevada 330881-28-04-145-06-02 PROXPAC XL Proximity Transducer

Description

Option 28 (3300 XL 8 mm probe with multiple approvals) and Option 04 (40 mm standoff adapter) specify this metric PROXPAC XL Proximity Transducer assembly configuration — 330881-28-04-145-06-02. The 145 mm probe penetration length (Option 145) paired with a 3/4-14 NPT mounting thread (Option 02) and an extensive NPT fitting kit (Option 06) completes this self-contained transducer system. This design integrates the probe and 3300 XL Proximitor sensor directly into a single molded glass-reinforced polyphenylene sulfide (PPS) housing, eliminating the need for an external extension cable and reducing overall field wiring complexity.

In contrast to non-metric configurations (330880) or those without a standoff adapter (Option 00), this metric assembly features a 40 mm standoff adapter (Option 04) and a 145 mm probe penetration length (Option 145). The inclusion of multiple agency approvals (Option 28) enables deployment in hazardous environments where intrinsically safe or non-incendive installations are required. The housing uses a glass- and conductive-fiber-reinforced PPS thermoplastic to dissipate electrostatic charges and withstand severe industrial environments. Rated for Type 4X and IP66, this assembly seals differential pressure between the probe tip and the housing body, preventing fluid ingress and protecting electrical interfaces under harsh conditions.

Features

• Option 28 probe and approvals configuration features a metric 3300 XL 8 mm proximity probe with multiple hazardous area approvals (ATEX, IECEx, and North American certifications).
• Option 04 standoff adapter provides a 40 mm spacing dimension to adjust probe positioning in machine cases.
• Option 145 designates a 145 mm probe penetration length (C dimension) measured along the protective sleeve.
• Option 06 fittings package supplies one 3/4-14 NPT fitting, one 3/4-14 NPT to 1 1/2-14 NPT stainless steel reducer, and two plugs for cable/conduit entry sealing.
• Option 02 mounting thread specifies a 3/4-14 NPT thread, required for installations utilizing the standoff adapter.
• Integrated Proximitor sensor inside the housing lid connects directly to field wiring terminal blocks, eliminating external probe-to-sensor extension cables.
• Thermoplastic housing molded from glass-reinforced polyphenylene sulfide (PPS) with conductive fibers dissipates static charges and resists impact.

Applications

This integrated proximity transducer is used for machinery protection on rotating equipment. Typical installations include:

• Radial vibration and axial position measurements on steam or gas turbines, centrifugal compressors, and industrial pumps.
• Machine cases where external probe adjustment or sleeve positioning is required.
• Hazardous industrial locations requiring certified intrinsically safe (Zone 0/Class I, Div 1) or non-incendive (Zone 2/Class I, Div 2) monitoring hardware.
• Applications with severe environments where resistance to corrosive process fluids, high humidity, and dust is required.

Ordering Information

Technical Specifications

Installation Guidelines

• Probe Gapping: Set the probe gap to 1.27 mm (50 mils) to establish the midpoint of the linear range.
• Sleeve Support: When the total length of the standoff adapter ("B" dimension) and probe penetration ("C" dimension) exceeds 305 mm (12 in), additional sleeve support is required near the probe to avoid resonance issues.
• Moisture Prevention: Take precautions to prevent moisture from entering the housing via the conduit. When properly sealed with NPT fittings and the lid is secured, moisture ingress is prevented.
• Field Wiring: Connect the monitor field wiring directly to the terminal connections inside the housing lid. Use 3-conductor twisted shielded cable (18 AWG recommended) with a maximum length of 305 meters (1000 feet).

Compliance and Certifications

• CE Mark: Compliant with applicable European directives
• IP Rating: IP66 / Type 4X rating for severe environmental protection (BASEEFA verified)
• Intrinsically Safe (ia): Ex ia IIC T4/T5 Ga (ATEX/IECEx); Class I, Zone 0: AEx/Ex ia IIC T4/T5 Ga; Class I, Groups A, B, C, D; Class II, Groups E, F, G; Class III (cNRTLus)
• Non-Sparking / Increased Safety (nA/ec): Ex nA IIC T4/T5 Gc; Ex ec IIC T4/T5 Gc (ATEX/IECEx); Class I, Division 2, Groups A, B, C, D (cNRTLus)