The Bently Nevada 330904-00-25-05-02-05, also cataloged as the 330904 Proximity Probe, operates as a dedicated hardware component for non-contacting vibration and displacement measurements within 3300 NSv Series platforms.

Suffix Selection Matrix

• 330904: 3300 NSv Proximity Probe, 3/8-24 UNF thread, without armor

• -00: Unthreaded length (0.0 in)

• -25: Overall case length (2.5 in)

• -05: Total length (0.5 m / 1.6 ft)

• -02: Miniature coaxial ClickLoc connector, standard cable

• -05: Multiple regional hazardous area approvals (including ATEX and CSA)

Technical Specification Table

Cross-Talk Suppression and Eddy-Current Scaled Profiles

The 3300 NSv probe utilizes a specialized eddy-current probe scaling optimized for small-diameter targets and tight physical geometries. Compared to standard 8 mm probes, the NSv series generates a more tightly focused magnetic field, providing structural cross-talk suppression when sensors are mounted in extreme spatial proximity on small rotor assemblies. This tight field geometry allows the probe to maintain an accurate calibration profile even when side-clearance boundaries to counterbores or adjacent machine components are restricted, minimizing the risk of side-wall signal interference altering the dynamic measurement loop.

Dispatch Package Kit List

• 1 x Bently Nevada 330904-00-25-05-02-05 Proximity Probe

• 2 x 3/8-24 UNF Hexagonal locking nuts

• 1 x Coaxial connector insulation sleeve

• 1 x Quality verification and physical calibration document pack

Mechanical Installation and Positioning

Physical installation requires strict adherence to unthreaded and threaded housing depth allocations. To anchor the transducer inside the linear measurement range, monitor the DC loop voltage via the Proximitor sensor output during mechanical insertion. Advance the probe toward the shaft until a baseline gap voltage validation target of -10.0 VDC is observed on the measurement instrument. Secure the locking hardware to the specified torque rating to eliminate mechanical drift induced by high-frequency rotor dynamics. Route the flexible coaxial cable through dedicated cable trays or conduit, maintaining a minimum bend radius of 25.4 mm. The miniature ClickLoc connector must be clean and locked with a positive engagement feel before sealing the junction.

Logistics Packaging Profiles

Delivery time: 2-7 days when payment finish, routed via DHL/FEDEX/UPS premium carriers. The unit is packaged in custom anti-static industrial packaging featuring multi-layer electrostatic discharge shielding bags and form-fitting shock-absorbing foam inserts to protect the integrated ceramic tip structure and high-frequency coaxial connector link during international transit.

Frequently Asked Questions

Q: Can a 3300 NSv series probe be matched with a standard 3300 XL 8 mm Proximitor sensor?

A: No. The 3300 NSv probe has different electrical characteristics and a more compact eddy-current field design than standard 8 mm probes. It must be paired exclusively with a 3300 NSv Proximitor sensor to achieve the specified 7.87 V/mm scale factor.

Q: What are the side-clearance constraints to prevent side-wall measurement distortion?

A: Due to the focused field pattern of the NSv series, the minimum required diametric clearance around the probe tip in a counterbore hole is 9.5 mm (0.38 in), which is significantly smaller than the clearance required for standard 8 mm systems.

Q: What condition is induced at the safety rack if the probe connector is disconnected while live?

A: Disconnecting the coaxial link breaks the resonant electrical loop of the Proximitor sensor. The circuit immediately saturates to a positive voltage limit, prompting the monitoring module to register a "Not OK" status, which automatically clamps the channel and prevents false relay actuation.