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Self-Contained 8mm Sensor for Critical Machinery Protection
The Bently Nevada 330881-01-00-000-00-02 PROXPAC XL proximity transducer combines a 3300 XL 8 mm probe with its Proximitor sensor in one compact, factory-sealed unit . This integrated design eliminates extension cables and external Proximitor enclosures, reducing installation complexity and potential failure points . The assembly delivers precise non-contact shaft vibration and position measurements for a wide range of rotating equipment . It serves steam turbines, gas turbines, compressors, pumps, and generators in power generation and oil and gas facilities .
Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | 330881-01-00-000-00-02 |
| Brand | Bently Nevada |
| Category | PROXPAC XL Proximity Transducer |
| Probe Type | 3300 XL 8 mm |
| Approvals Option | 01 = CSA / ATEX / IECEx |
| Standoff Adapter (B Dimension) | 00 = None (no standoff adapter) |
| Probe Penetration (C Dimension) | 000 = No penetration (probe is flush with housing face) |
| Connector Option | 00 = No connector (flying leads) |
| System Length Option | 02 = 2.0 meters (6.6 feet) |
| Scale Factor | 7.87 V/mm (200 mV/mil) |
| Linear Range | 2.0 mm (80 mils) |
| Frequency Response | 0 to 10 kHz |
| Output Impedance | 50 Ω |
| Supply Voltage | -17.5 Vdc to -26 Vdc |
| Current Consumption | 12 mA maximum |
| Operating Temperature | -51°C to +177°C |
| Housing Rating | Type 4X and IP66 |
| Housing Material | PPS thermoplastic with glass and conductive fibers |
| Probe Tip Material | Polyphenylene Sulfide (PPS) |
| Probe Case Material | AISI 304 stainless steel |
| Mounting Thread | 3/4-14 NPT |
| Weight | 1.44 kg (3.2 lb) |
| Country of Origin | USA |
Self-Contained Design Advantages
This transducer combines the probe, extension cable, and Proximitor sensor into a single matched assembly . This integration significantly reduces installation time and eliminates the need for separate sensor housing. The PPS thermoplastic construction resists chemical attack from synthetic oils, fuels, and industrial solvents . Moreover, the housing carries Type 4X and IP66 ratings for severe environment operation .
Rugged Construction for Industrial Reliability
The assembly operates reliably across a wide temperature range from -51°C to +177°C . The PPS thermoplastic housing effectively dissipates electrostatic charges, protecting sensitive internal electronics . AISI 304 stainless steel construction of the probe case ensures excellent corrosion resistance . This robust design delivers reliable performance in demanding power generation and petrochemical environments .
Precision Measurement Capability
The eddy-current sensing technology provides accurate displacement readings across the 2 mm linear range . The 7.87 V/mm scale factor ensures reliable vibration and position measurements. The 0 to 10 kHz frequency response captures both slow shaft movements and high-speed vibrations . Consequently, the assembly enables early detection of bearing wear, unbalance, and misalignment .
Installation Flexibility
The assembly mounts directly to the machine casing via a 3/4-14 NPT thread . Flying leads at the connector end allow termination directly to terminal blocks or field junction boxes . This design supports up to 305 meters (1000 feet) of field wiring without signal degradation . Therefore, the transducer suits remote installations where cable runs exceed typical extension cable lengths .
Condition Monitoring Integration
The assembly integrates seamlessly with 3300 series racks and 3500 series monitoring systems . It provides both vibration and position data for comprehensive machinery protection . The high-resolution output enables early fault identification and planned maintenance scheduling . Its proven reliability makes it a trusted choice for critical turbomachinery protection worldwide .