



Compact Integrated Proximity Monitoring for Maximum Equipment Reliability
The Bently Nevada 330881-28-00-050-03-02 PROXPAC XL Proximity Transducer is a fully integrated eddy current proximity transducer assembly designed to simplify shaft vibration and position monitoring on critical rotating machinery. Combining the 3300 XL 8 mm Proximity Probe, 3300 XL Proximitor Sensor, and rugged probe housing into one compact unit, the PROXPAC XL eliminates the need for a separate extension cable and external Proximitor enclosure, significantly reducing installation time while improving overall system reliability.
The 330881-28-00-050-03-02 configuration features a 3300 XL 8 mm probe with multiple approvals, 50 mm probe penetration, one M20 conduit fitting with two sealing plugs, and a 3/4-14 NPT mounting thread, making it suitable for demanding industrial installations in power generation, oil & gas, petrochemical processing, and other heavy-duty applications. Its advanced glass-fiber reinforced PPS (Polyphenylene Sulfide) enclosure provides outstanding corrosion resistance and meets Type 4X and IP66 environmental protection standards for harsh operating conditions.
Designed for continuous online condition monitoring, the PROXPAC XL delivers highly accurate shaft displacement measurements while minimizing wiring complexity and maintenance requirements, helping operators maximize equipment uptime and improve predictive maintenance efficiency.
Product Specifications
| Specification | Details |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 330881-28-00-050-03-02 |
| Product Type | PROXPAC XL Proximity Transducer |
| Series | 330881 PROXPAC XL |
| Measurement Principle | Eddy Current Proximity Measurement |
| Integrated Components | 3300 XL 8 mm Probe & 3300 XL Proximitor Sensor |
| Probe Option | 28 – 3300 XL 8 mm Probe with Multiple Approvals |
| Standoff Adapter | 00 – None |
| Probe Penetration | 050 – 50 mm |
| Fittings Option | 03 – One M20 Fitting with Two Sealing Plugs |
| Mounting Thread | 02 – 3/4-14 NPT |
| Output | Shaft Vibration & Shaft Position |
| Power Supply | -17.5 to -26 VDC |
| Maximum Current Consumption | 12 mA |
| Output Resistance | 50 Ω |
| Housing Material | Glass-Fiber Reinforced Polyphenylene Sulfide (PPS) |
| Environmental Rating | Type 4X / IP66 |
| Probe Operating Temperature | -51°C to +177°C |
| Housing Operating Temperature | -51°C to +100°C |
| Dimensions | Approximately 235 × 120 × 95 mm |
| Weight | Approximately 2.0 kg |
Typical Applications
The 330881-28-00-050-03-02 is engineered for continuous monitoring of shaft vibration and displacement in mission-critical rotating equipment operating in demanding industrial environments.
Typical applications include:
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Steam turbines
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Gas turbines
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Centrifugal compressors
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Turbo expanders
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Industrial generators
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Large electric motors
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Process pumps
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Gearboxes
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Petrochemical plants
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Oil & gas production facilities
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LNG processing equipment
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Power generation stations
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Mining processing systems
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Paper and pulp production equipment
Its integrated design reduces installation complexity while delivering precise shaft vibration, axial position, and displacement measurements essential for machinery protection and predictive maintenance.
Why Choose the 330881-28-00-050-03-02?
Built for reliable operation in harsh industrial environments, this PROXPAC XL assembly offers several performance advantages:
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Integrated probe and Proximitor sensor eliminate extension cables
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Compact all-in-one assembly reduces installation time
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Type 4X and IP66 enclosure protects against dust, moisture, and corrosion
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Advanced PPS housing resists impact, chemicals, and electrostatic buildup
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High-accuracy eddy current measurement technology
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Fewer connection points improve long-term system reliability
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Simplified field wiring lowers maintenance costs
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Supports continuous online machinery protection
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Compatible with Bently Nevada 3500 Series monitoring systems
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Ideal for predictive maintenance and asset reliability programs
Technical FAQs
1. What is the primary purpose of the 330881-28-00-050-03-02?
It provides continuous shaft vibration and shaft position measurements for rotating machinery using integrated eddy current proximity sensing technology.
2. What makes the PROXPAC XL different from a conventional proximity transducer system?
The PROXPAC XL integrates the probe, Proximitor sensor, and housing into a single assembly, eliminating the need for a separate extension cable and external sensor housing.
3. Which probe is included in this configuration?
This model includes a 3300 XL 8 mm proximity probe with multiple agency approvals.
4. What does the "050" option indicate?
The 050 option specifies a 50 mm probe penetration length, providing installation flexibility for various machinery configurations.
5. What environmental protection does the housing provide?
The enclosure is rated Type 4X and IP66, offering excellent protection against water, dust, and harsh industrial conditions.
6. Which industries commonly use this product?
It is widely deployed in power generation, oil and gas, petrochemical, mining, marine, and heavy industrial facilities for machinery protection.
7. Which machinery can be monitored?
The transducer is suitable for turbines, compressors, pumps, generators, motors, and other rotating equipment requiring shaft displacement or vibration monitoring.
8. Does the integrated design improve reliability?
Yes. Eliminating the extension cable reduces connection points and potential failure sources, improving long-term measurement stability and simplifying maintenance.
9. What are the approximate dimensions and weight?
The assembly measures approximately 235 × 120 × 95 mm and weighs about 2.0 kg, making it suitable for permanent industrial installations.
10. Why is the 330881-28-00-050-03-02 a preferred solution?
Its integrated architecture, rugged environmental protection, simplified installation, and proven Bently Nevada measurement technology provide dependable machinery protection while reducing lifecycle maintenance costs.