Bently Nevada 330881-28-00-125-00-02 PROXPAC XL Proximity Transducer

Description

Option 28 (3300 XL 8 mm probe with Multiple Approvals) and Option 125 (125 mm probe penetration length) specify this metric PROXPAC XL proximity transducer configuration — 330881-28-00-125-00-02. The assembly integrates a 3300 XL 8 mm proximity probe and a 3300 XL Proximitor sensor directly into a single, glass-reinforced polyphenylene sulfide (PPS) thermoplastic housing. This self-contained layout eliminates the need for an external extension cable or a separate Proximitor housing. Field wiring connects directly from the monitor to the internal terminal strip inside the housing lid, significantly reducing wiring complexity on rotating machinery installations.

The thermoplastic PPS housing is engineered with glass and conductive fibers, allowing it to withstand severe industrial environments while effectively dissipating electrostatic charges. It carries Type 4X and IP66 environmental protection ratings, replacing traditional metal enclosures with superior corrosion resistance. This configuration features a 125 mm sleeve penetration length without an external standoff adapter, fitted with a standard 3/4-14 NPT mounting thread and standard sealing plugs instead of additional field conduit fittings.

Features

• Integrated Design: Combines the proximity probe and Proximitor sensor into a single, compact housing to remove the need for extension cables.
• 125 mm Probe Sleeve: Built with a 125 mm metric probe sleeve length (Option 125) and a 3/4-14 NPT mounting thread (Option 02) with no standoff adapter.
• Multiple Approvals: Equipped with a 3300 XL 8 mm probe that includes international agency hazardous area approvals (Option 28).
• Anti-Static PPS Enclosure: Molded polyphenylene sulfide housing uses integrated glass and conductive fibers to increase impact strength and discharge static buildup.
• Heavy Environmental Rating: IP66 and Type 4X certified to prevent the entry of dust and heavy water sprays.

Applications

The 330881-28-00-125-00-02 is used for industrial machinery protection and condition monitoring. It is suited for environments where mechanical space or remote mounting constraints make separate extension cables and Proximitor sensor housings impractical. Typical applications include:

• Shaft vibration and axial position measurements on steam turbines, gas turbines, and large industrial pumps.
• Casing vibration and radial dynamic displacement monitoring on industrial gearboxes and compressors.
• Machinery installations requiring simplified field wiring with direct connection to the monitoring system.
• Corrosive or severe chemical processing environments requiring thermoplastic housings rather than steel or aluminum.

Ordering Information

Technical Specifications

Installation Guidelines

To ensure proper mechanical assembly and measurement stability, follow these guidelines during installation:

• Torque Limits: Tighten the housing retaining nut to 29.5 N-m (260 in-lb) and the probe sleeve locknut to 39.3 N-m (350 in-lb) to maintain secure structural mounting.
• Low Temperature Limit: Exposing the probe to temperatures below -34 degC (-29 degF) can lead to premature failure of the internal pressure seal.
• Sleeve Deflection: Combined sleeve and adapter (B plus C) dimensions exceeding 305 mm (12 in) require additional mechanical support near the probe tip to prevent resonance and vibration interference.
• Moisture Mitigation: While the IP66 and Type 4X thermoplastic housing blocks external liquid ingress, install sealing conduit fittings or seal the field conduit paths to prevent condensation from traveling down the wiring into the housing.

Compliance and Certifications

The 330881 PROXPAC XL configuration complies with the following standards and approvals:

• CE Mark: Compliant with European Community Directives, including EMC Directive 2014/30/EU and RoHS Directive 2011/65/EU.
• Hazardous Area Certifications: Option 28 indicates multiple approvals (such as CSA, ATEX, and IECEx) for installation in hazardous environments.
• Enclosure Protection: Housing IP66 rating verified by BASEEFA report number T07/0709.
• FCC: Complies with Part 15 of the FCC rules regarding electromagnetic interference.