Product datasheet 

Core Description

The 330881-28-06-155-03-02 is a Bently Nevada PROXPAC XL metric proximity transducer assembly featuring a self-contained probe and sensor system. Completely integrated within a Type 4X and IP66 molded thermoplastic housing, this unit works seamlessly with machinery monitors to deliver direct field wiring loops and stable industrial vibration monitoring communication.

Specific Application

• Cable-Free Field Proximity Sensing: Integrating an 8mm probe and a 3300 XL Proximitor sensor inside one enclosure to drop intermediate extension cables.
• Corrosive Asset Environment Placement: Utilizing a rugged glass-reinforced Polyphenylene Sulfide thermoplastic body to resist harsh hot water washdowns and discharge static buildup.
• Deep Case Metric Penetration Access: Supplying a targeted 60mm standoff spacer and a 155mm penetration sleeve to route probes safely through thick metric-machined casing jackets.

System Compatibility

• Direct Monitor Connections: Eliminates discrete Proximitor housings by feeding field wiring straight from the assembly panel terminal blocks to the rack monitors.
• Long Distance Field Cabling: Directs real-time signals reliably over a maximum length of 305 meters (1,000 feet) using 3-conductor shielded triaxial wiring.
• Industry Standards Matching: Complies fully with European CE directives, Type 4X standards, and API 670 backward compatibility metrics.

Alternative Model & Differences

• Alternative Model: English PROXPAC XL Transducer Assembly (Part Number 330880).
• Key Differences:
• Measurement Dimension Systems: The 330881 framework tracks parameters strictly on metric units (ordered in 10mm standoff steps and 1mm sleeve penetration increments), while the 330880 system relies completely on English fractions (0.5-inch and 0.1-inch steps).
• Thread Machining Profiles: This metric part number features standard 3/4-14 NPT outer sleeve threads coupled with customized metric conduit entries (like M25 or M20 sets), whereas the English module relies on dedicated NPT fitting adapters throughout.

Ordering Information Summary

Installation & Troubleshooting FAQ

Q1: What unique hardware torque limits and structural traits apply to this 330881 metric assembly?

A: This metric module features an ultraviolet (UV) resistant thermoplastic cover mated to a stainless steel sleeve assembly. To anchor the threads against industrial asset micro-vibrations, use a calibrated wrench to torque the primary retaining nut precisely to 29.5 N·m (260 in·lb). Following that step, torque the outer probe sleeve locknut to its maximum limit of 39.3 N·m (350 in·lb).

Q2: Why is my monitor tracking a limited linear range from the integrated 3300 XL Proximitor sensor?

A: A limited linear window indicates that the input supply line is dropping more positive than -23.5 VDC. The self-contained sensor requires an operating power loop between -17.5 VDC and -26 VDC when connected without barriers, and -23 VDC to -26 VDC when passing through zener barriers. If power distribution sags, the module cannot reach its standard 2 mm (80 mils) linear range.

Q3: How do I calculate total mechanical spacing and protect the gold-plated ClickLoc connector from moisture?

A: The combined standoff and sleeve dimensions describe the mid-setting distance, and the threaded sleeve allows an adjustment of +/-12.7 mm (+/-0.5 in). While the PPS body seals against water under Type 4X metrics, the golden connector remains highly vulnerable to conductive fluid ingress. Always wrap the junction with silicone connector protectors or self-fusing waterproof rubber tape to stop signal glitches.

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