Overview: Bently Nevada 330904-00-25-50-02-00 3300 NSv Proximity Probe
When process compressors demand reliable vibration monitoring, the Bently Nevada 330904-00-25-50-02-00 3300 NSv Proximity Probe delivers precision and durability. This industrial automation module is designed for eddy-current displacement measurements, providing accurate shaft vibration and position data in critical rotating machinery. As part of the 3300 NSv series, this probe offers enhanced chemical resistance compared to earlier 3300 RAM models, making it ideal for harsh process environments.
The 330904-00-25-50-02-00 features a 5.0-meter overall length, a 250 mm case length, and a miniature coaxial ClickLoc connector. It is mechanically and electrically interchangeable with previous 3300 RAM probes, simplifying upgrades. With a linear range of 1.5 mm (60 mils) and an incremental scale factor of 7.87 V/mm, this probe ensures high-resolution measurements for predictive maintenance.
Key Technical Specifications
| Parameter |
Value |
| Model |
330904-00-25-50-02-00 |
| Probe Type |
3300 NSv Proximity Probe, M8x1 thread, with armor |
| Overall Length |
5.0 meters (16.4 feet) |
| Case Length |
250 mm |
| Connector |
Miniature coaxial ClickLoc, standard cable |
| Probe DC Resistance (center to outer) |
5.3 ± 0.7 ohms |
| Linear Range |
1.5 mm (60 mils) from 0.25 to 1.75 mm |
| Recommended Gap Setting |
1.0 mm (40 mils) |
| Incremental Scale Factor |
7.87 V/mm (200 mV/mil) +12.5%/-20% |
| Deviation from Best Fit Straight Line |
Less than ±0.06 mm (±2.3 mils) |
| Frequency Response |
0 to 10 kHz: +0, -3 dB typical |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel (SST) |
| Operating Temperature |
-52°C to +177°C (-62°F to +351°F) |
| Storage Temperature |
-52°C to +177°C (-62°F to +351°F) |
| Maximum Torque |
0.56 N•m (5 in•lb) |
| Minimum Bend Radius |
25.4 mm (1.0 in) |
Performance and Compatibility
The Bently Nevada 330904-00-25-50-02-00 is engineered for superior side-view characteristics, outperforming the 3000-series 190 probe when gapping at the same distance. This probe is compatible with Bently Nevada's 3300 XL NSv Proximitor Sensor, and field wiring can extend up to 305 meters (1,000 feet) while maintaining frequency response. The extension cable offers a center conductor resistance of 0.220 Ω/m and capacitance of 69.9 pF/m, ensuring signal integrity.
This probe is suitable for axial position measurements on shafts, with a recommended minimum target diameter of 13 mm (0.5 in). For smaller shafts, adjusting the gap can mitigate scale factor changes. The probe's PPS tip and stainless steel case provide robustness in demanding industrial settings.
Installation Guidance
Proper installation is critical for accurate readings. Mount the probe with finger-tight torque, and do not exceed the maximum torque of 0.56 N•m (5 in•lb) to avoid damaging the threads. The M8x1 thread allows up to 12 mm of engagement. Maintain a minimum bend radius of 25.4 mm for the cable to prevent kinking. When wiring, use a three-conductor shielded triad cable with 0.2 to 1.5 mm² (16 to 24 AWG) conductors. For optimal performance, set the gap to 1.0 mm (40 mils) from the target.
Maintenance and Reliability
Regular inspection of the probe cable and connector is recommended to ensure reliable operation. The Viton O-ring seal helps maintain differential pressure integrity, but probes are not pressure-tested before shipment; if your application requires pressure testing, consult the custom design department. The probe operates across a wide temperature range (-52°C to +177°C), making it suitable for extreme environments. With proper care, this probe offers long service life, reducing downtime and maintenance costs.
Selection Guide
When selecting a replacement or upgrade, verify the exact part number 330904-00-25-50-02-00 to ensure compatibility with your existing 3300 NSv system. This probe is available from PLC Source PRO in new, original factory packing with a 12-month warranty. Confirm your required cable length and connector type before ordering. For technical assistance, contact our team to ensure you choose the right probe for your machinery.