330881-28-04-045-03-02 Bently Nevada PROXPAC XL Transducer

**Product Introduction**

The 330881-28-04-045-03-02 is a high-integrity PROXPAC XL Proximity Transducer system that integrates the industry-standard 3300 XL 8mm probe into a reinforced, weather-proof housing. This Bently Nevada assembly provides a robust solution for proximity measurements in hazardous and corrosive environments. 

**Technical Performance Summary**

• Linear Range: 2.0 mm (80 mils) total displacement tracking capability.
• Incremental Scale Factor (ISF): 7.87 V/mm (200 mV/mil) with 5% tolerance.
• Frequency Response: Precise signal output from 0 Hz to 10 kHz.
• Ingress Protection: IP66 rated housing for harsh industrial exposure.
• Operating Temperature: -51 °C to +177 °C for the probe assembly.
• Power Requirements: -17.5 Vdc to -26 Vdc nominal supply voltage.
• Impact Strength: Certified 4 Joule impact resistance at extreme temperatures.
• Signal Sensitivity: Excellent supply voltage rejection under 2 mV/V.

**330881-28-04-045-03-02 Configuration Breakdown**

• 330881 (Base Model: PROXPAC XL Proximity Transducer)
  • -28 (Probe and Approvals Option)
    • 3300 XL 8 mm probe
    • Global Multiple Approvals (Hazardous Area Rated)
  • -04 (Standoff Adapter Option)
    • 40 mm B Dimension Standoff
  • -045 (Probe Penetration Option)
    • 45 mm C Dimension Penetration
  • -03 (Fittings Option)
    • One M20 fitting with two sealing plugs
  • -02 (Mounting Thread Option)
    • 3/4-14 NPT Heavy-duty mounting threads

**Equipment Suitability & Application**

• Primary Equipment: Steam and Gas Turbines, Hydro-generators, Centrifugal Compressors.
• Measurement Types: Radial vibration, axial thrust position, and speed sensing.
• Diagnostic Capabilities: Provides raw buffered output for orbit plots and gap voltage analysis.
• Material Compatibility: Optimized for AISI 4140 steel targets; other materials require re-calibration.

**Material Integrity**

• Probe Case: AISI 304 Stainless Steel for maximum corrosion resistance.
• Housing Material: UV-resistant, glass-reinforced PPS thermoplastic with conductive fibers.
• Connector Type: Gold-plated brass ClickLoc locking mechanism.
• Seal Material: Neoprene O-rings for reliable environmental isolation.

**Logistics and Service Terms**

• Shipping Methods: Global priority delivery via FedEx, UPS, and DHL.
• Dispatch Lead Time: Order processing completed within 24-48 hours.
• Warranty Terms: Includes a full 12-month quality guarantee.
• Packaging Weight: Approximately 1.44 Kg for the complete assembly.

**Professional FAQ & Selection Guide**

• Question: Why is the 3/4-14 NPT thread mandatory for this specific configuration?
  Answer: Because the 40mm standoff adapter (Option 04) creates additional leverage, the 330881-28-04-045-03-02 requires the NPT thread to ensure mechanical stability under vibration.
• Question: Can the PROXPAC XL housing be mounted directly on a machine with high surface temperatures?
  Answer: While the probe resists up to 177 °C, the PPS housing should be kept within its rated limits; the 40mm standoff helps thermally isolate the electronics.
• Question: Does this system support long-distance field wiring?
  Answer: Yes, it supports up to 305 meters (1,000 feet) of shielded triaxial field wiring without significant signal degradation.
• Question: What is the significance of the 1.27 mm gap setting?
  Answer: This 50 mil gap ensures the probe operates in the center of its 80 mil linear range, providing maximum headroom for vibration peaks.
• Question: Is the 330881 series suitable for underwater applications?
  Answer: The IP66 rating covers high-pressure water jets and dust, but it is not designed for continuous submersion.

**Packing List**

• 1 x Bently Nevada 330881-28-04-045-03-02 Assembly.
• 1 x Integrated 3300 XL 8mm Probe.
• 2 x M20 Port Plugs.
• 1 x Factory Calibration Certificate.

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