Bently Nevada 330881-28-04-105-00-02 PROXPAC XL Proximity Transducer Assembly

Description

The PROXPAC XL Proximity Transducer Assembly integrates a 3300 XL 8 mm proximity probe and its associated Proximitor sensor directly into a self-contained, field-mountable thermoplastic housing. This streamlined architecture eliminates the need for an external extension cable between the probe and sensor, while allowing direct connection of field wiring between the monitoring system and the assembly.

Constructed from glass- and conductive-fiber-reinforced Polyphenylene Sulfide (PPS), the housing delivers robust mechanical strength and effective electrostatic charge dissipation. Engineered for severe industrial environments, it features an IP66 and Type 4X rating to resist moisture and harsh elements. This configuration 330881-28-04-105-00-02 specifically utilizes a metric configuration with specialized standoff, penetration, and fitting options tailored for rotating machinery vibration and position monitoring.

Features

• Self-Contained Design: Combines the proximity probe and Proximitor sensor into a unified unit, removing intermediate extension cables and separate transmitter enclosures.
• Advanced Material Housing: Molded PPS thermoplastic housing with conductive fibers replaces traditional aluminum or steel, boosting chemical resistance and durability.
• Adjustable Deployment: The threaded stainless steel sleeve facilitates fine-tuning of the probe gap position by up to plus or minus 12.7 mm.
• Environmental Protection: Certified to IP66 and Type 4X standards, ensuring robust seal performance against hose-directed water and condensing humidity.

Applications

• Radial vibration monitoring on high-speed industrial rotating machinery shafts.
• Axial position (thrust) measurements for turbines, compressors, and pumps.
• Dynamic asset protection and condition monitoring within hazardous chemical or oil and gas processing facilities.

Ordering Information

Technical Specifications

Installation Guidelines

• Probe Gap Adjustment: Ensure the default deployment is gapped close to the center of the linear range at 1.27 mm (50 mils) from the target shaft surface.
• Sleeve Adjustments: Use the threaded outer sleeve to perform fine mechanical adjustments; the configuration permits an installation leeway of plus or minus 12.7 mm from the mid-setting point.
• Resonance Mitigation: For combined "B" (Standoff) and "C" (Penetration) dimensions exceeding 305 mm, provide additional mechanical sleeve support near the probe assembly to eliminate resonance vibration errors.
• Moisture Protection: Apply appropriate sealing to conduit entries to prevent liquid or condensation migration down the cable runs into the main housing cavity.
• Torque Specifications: Fasten the main retaining nut to 29.5 N-m and tighten the probe sleeve locknut to 39.3 N-m to maintain standard environmental and mechanical seal integrity.

Compliance and Certifications

• EMC: European Community Directive 2014/30/EU; Standards EN 61000-6-2 (Immunity) and EN 61000-6-4 (Emissions).
• RoHS: European Community Directive 2011/65/EU.
• FCC: Complies with Part 15 of FCC Rules.
• Maritime: 2019 Rules for Conditions of Classification (Part 1) for Offshore Units and Structures.
• Hazardous Area Approvals: Certified for Class I, Zone 0/2, Groups A, B, C, D intrinsically safe (Ex ia) and non-incendive (Ex nA/ec) installations when mounted per manufacturer installation drawings.

FAQ

What is the benefit of the integrated housing design over standalone proximity sensors?

The integrated layout contains both the probe sleeve assembly and the 3300 XL Proximitor sensor in one unit, bypassing the need for an intermediate extension cable or a separate remote junction box. Field wiring links directly from the monitor to the internal housing terminals.

Can this proximity transducer housing withstand outdoor or washdown installations?

Yes, the outer housing is molded from glass-reinforced polyphenylene sulfide and rated to IP66 and Type 4X, providing certified defense against hose-directed water and high-humidity environments when properly sealed.

What precautions apply if the standoff and penetration length options are long?

When the sum of the B and C dimensions is greater than 305 mm, it is mandatory to use external sleeve supports near the probe body to stiffen the mechanism and safeguard the components against resonance distortion.