The Bently Nevada 330905-12-22-05-02-05, also cataloged as the 3300 NSv Proximity Probe, operates as a dedicated hardware component for non-contact shaft vibration and displacement measurement within machinery protection monitoring systems.
The 330905 model code configures specific physical geometry, cable construction, and certification profiles for the 3300 NSv probe:
| Parameter | Specification |
|---|---|
| Model | 330905-12-22-05-02-05 |
| Brand | Bently Nevada |
| Origin | USA |
| Weight | 0.15 kg |
| Dimensions | M8 x 1.25 thread, 5 mm tip diameter |
| Operating Temp | -40 to 120 deg C |
| Power Consumption | Powered via 3300 XL NSv Proximitor Sensor (24 VDC system loop input) |
| Measurement Range | Optimized for target shafts under 51 mm diameter and flat targets under 15 mm |
| Cable Assembly | 12 m total system cable configuration, armored coaxial lead |
| Interface Connector | Miniature coaxial ClickLoc connector with connector protector |
| Standard Compliance | API 670 compliant |
The 3300 NSv probe generates a high-frequency electromagnetic field at the 5 mm probe tip to measure gap changes relative to a conductive target surface. Due to the reduced side-view clearance requirement of the NSv profile, eddy-current probe scaling maintains a linear response on small-diameter shafts where standard 8 mm probes experience side-view interference. Field commissioning requires gap voltage validation to confirm the probe is set within its linear operating region. Adjusting the mechanical position until the DC gap voltage reaches -10 VDC at the Proximitor output ensures proper centered operation, while maintaining minimum probe-to-probe physical spacing prevents cross-talk suppression issues in dense radial bearing installations.
Q: What target surface constraints apply to the 3300 NSv probe tip?
A: The 5 mm tip diameter and linear field geometry are optimized for shafts under 51 mm in diameter or flat target surfaces under 15 mm, preventing measurement non-linearity caused by target curvature or side clearance restrictions.
Q: How is signal integrity maintained across the coaxial connector junction?
A: The miniature coaxial ClickLoc connector requires positive mechanical latching. The integrated connector protector must be fully seated over the junction to seal against moisture and conductive fluid contamination that alters RF impedance.
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