Product Overview
The Bently Nevada 330881-01-00-000-00-02 is a PROXPAC XL Proximity Transducer designed for precise, non-contact measurement in industrial machinery protection systems. This module provides a linear range of 2 mm (80 mils) and an incremental scale factor of 7.87 V/mm (200 mV/mil), making it ideal for monitoring shaft vibration and position in turbines, compressors, and other critical rotating equipment. As a genuine Bently Nevada part, it ensures reliable performance in demanding environments.
Technical Specifications
| Parameter |
Value |
| Linear Range |
2 mm (80 mils) |
| Incremental Scale Factor (ISF) |
7.87 V/mm (200 mV/mil) ±5% |
| Frequency Response |
0 to 10 kHz: +0, -3 dB |
| Operating Temperature Range |
-51 °C to +177 °C (-60 °F to +350 °F) |
| Supply Voltage |
-17.5 Vdc to -26 Vdc without barriers; -23 Vdc to -26 Vdc with barriers |
| Output Resistance |
50 Ω |
| Recommended Gap Setting |
1.27 mm (50 mils) |
| Minimum Target Size |
15.2 mm (0.6 in) diameter (flat target) |
| Minimum Shaft Diameter |
50.8 mm (2.0 in) |
| Weight |
1.44 kg (3.2 lbm) typical |
Applications
The Bently Nevada 330881-01-00-000-00-02 excels in machinery protection systems where accurate displacement measurement is critical. Its 2 mm linear range and 7.87 V/mm sensitivity suit steam turbine shaft vibration monitoring, where early detection of imbalance or misalignment prevents catastrophic failure. In centrifugal compressors, the transducer's -51 °C to +177 °C operating range ensures reliable performance in extreme temperatures. For gas turbine axial position measurement, the 0 to 10 kHz frequency response captures fast transients. PLC Source PRO supplies genuine Bently Nevada parts with fast quote response and quick dispatch, ensuring your maintenance schedules stay on track.
Compatibility and Selection Guide
The 330881-01-00-000-00-02 PROXPAC XL integrates seamlessly with 3300 XL Proximitor Sensors and monitors. It requires a -17.5 Vdc to -26 Vdc supply without barriers, or -23 Vdc to -26 Vdc with barriers. The gold-plated brass ClickLoc connector ensures secure, low-resistance connections. For proper installation, use 3-conductor shielded triax cable with 0.2 to 1.5 mm² (16 to 24 AWG) field wiring, and maintain a maximum length of 305 metres (1000 feet) between the Proximitor sensor and monitor. When selecting this model, verify that your target size is at least 15.2 mm (0.6 in) diameter and shaft diameter is at least 50.8 mm (2.0 in). The 3/4-14 NPT mounting thread option requires a standoff adapter if used. PLC Source PRO provides technical support to ensure correct configuration for your specific application.
Installation and Maintenance
Install the Bently Nevada 330881-01-00-000-00-02 with a recommended gap setting of 1.27 mm (50 mils) for optimal linear range. The probe withstands tensile forces up to 330 N (75 lb) between cable and case. For retaining nut, apply 29.5 N·m (260 in·lb) torque; for probe sleeve locknut, use 39.3 N·m (350 in·lb). The housing, rated IP66, resists dust and water ingress. Routine maintenance includes verifying supply voltage and inspecting the ClickLoc connector for corrosion. Avoid exposing the probe to temperatures below -34 °C (-29 °F) to prevent pressure seal failure. The AISI 304 stainless steel probe case and PPS tip offer durability in harsh industrial environments.