Bently Nevada 330881-28-00-100-06-02 PROXPAC XL Proximity Transducer

Description

Option 28 (3300 XL 8 mm probe with Multiple Approvals) and Option 06 (one NPT fitting and reducer kit) define this metric PROXPAC XL Proximity Transducer assembly configuration — 330881-28-00-100-06-02. This integrated system combines a 3300 XL 8 mm proximity probe and a 3300 XL Proximitor sensor directly into a single, glass-reinforced polyphenylene sulfide (PPS) thermoplastic housing. By eliminating the typical extension cable between the probe and Proximitor, this configuration simplifies field wiring by routing connections directly from the monitor to the transducer assembly itself. The PPS material incorporates glass and conductive fibers to increase mechanical robustness and dissipate electrostatic charges, ensuring durable operation in demanding industrial areas.

Unlike basic variants with unapproved sensors or different mechanical mounting configurations, this specific assembly includes a probe certified for multiple hazardous area approvals, a 100 mm probe penetration length, and a 3/4-14 NPT mounting thread. It is designed for direct machinery casing mounting to monitor shaft vibration and axial position, with an integrated gland and plug kit (Option 06) to seal the field wiring entry.

Features

• Option 28 Probe with Multiple Approvals: Includes a 3300 XL 8 mm probe pre-installed and certified for hazardous environments under global standards.
• Integrated Proximitor Design: Places the Proximitor sensor directly inside the housing cover to eliminate the need for an external extension cable.
• Glass-reinforced PPS Thermoplastic: Features a conductive fiber-filled polyphenylene sulfide housing rated for Type 4X and IP66 environments.
• Option 100 Penetration Depth: Provides a 100 mm probe penetration length for direct machinery casing installation.
• Option 02 Mounting Thread: Features a 3/4-14 NPT thread on the outer sleeve assembly.
• Option 06 Fittings Kit: Supplied with 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 entrance sealing.

Applications

• Radial shaft vibration and axial position monitoring on large rotating machinery.
• Direct machinery casing installations requiring external adjustment of proximity probes.
• Corrosive or humid environments where separate Proximitor housings and extension cables are prone to environmental degradation.
• Hazardous area industrial settings requiring certified intrinsically safe or non-incendive transducer loops.

Ordering Information

Technical Specifications

Installation Guidelines

• Grounding: Ensure the integrated PPS housing grounding liner and retaining plate are properly bonded to local machine casing ground to dissipate static charges effectively.
• Probe Gap: Gap the 3300 XL 8 mm probe at approximately 1.27 mm (50 mils) to establish center voltage within the 2.0 mm (80 mils) linear operating range.
• Conduit and Moisture Seal: Use the provided Option 06 fittings (3/4-14 NPT and 3/4-14 NPT to 1 1/2-14 NPT SST reducer) with proper thread sealant. Users must prevent moisture from traveling down the conduit into the housing by using a conduit seal.
• Sleeve Installation: Tighten the outer sleeve locknut to a recommended torque of 39.3 N-m (350 in-lb) and the retaining nut to 29.5 N-m (260 in-lb) to prevent process leaks and ensure mechanical rigidity.
• Resonance Prevention: For custom assemblies where combined standoff "B" and penetration "C" exceed 305 mm (12 inches), install additional sleeve supports to avoid vibrational resonance.

Compliance and Certifications

The integrated transducer system complies with major global standards:

• CE Mark: Complies with applicable European Union directives.
• CSA (CNRTLUS): Intrinsically Safe (Class I, Zone 0, Groups A, B, C, D) and Non-Incendive (Class I, Division 2, Groups A, B, C, D) installations.
• ATEX/IECEx: Approved for hazardous areas with EPL Ga (Ex ia IIC T4/T5 Ga) and EPL Gc (Ex nA/ec IIC T4/T5 Gc) ratings.
• Enclosure Protection: Enclosure design is IP66 and Type 4X certified for severe industrial environments.