Engineered for specialized machinery configurations with strict spatial limits, the Bently Nevada 330908-00-15-70-02-05 (330908-00-15-70-02-05 3300 NSv Proximity Probes) delivers high-frequency eddy-current response for non-contact shaft telemetry.

Part Matrix and Designation Breakdown

• Model Series: 330908 (3300 NSv Unarmored Probe Assembly)
• Unthreaded Section: 00 (0.0 in unthreaded body)
• Threaded Case Length: 15 (1.5 in overall case length)
• Integral Cable Length: 70 (7.0 meters / 23.0 feet lead)
• Connector Mechanism: 02 (Miniature coaxial ClickLoc standard configuration)
• Regulatory Certification: 05 (Multiple Approvals)
• Instrument Platform: Bently Nevada 3300 XL NSv

Technical Data Specification

Telemetry Tuning and Dynamic Calibration

Maintaining accurate vibration diagnostics requires precise verification of the probe gap voltage at the associated Proximitor output terminals. Technicians must adjust mechanical positioning until the static operating point registers -10 VDC, keeping within the linear window of -8 VDC to -12 VDC. Signal fidelity depends on maintaining continuous shield integrity and routing coaxial leads away from high-frequency variable-speed drives to eliminate electromagnetic cross-talk.

Package Contents

• 1 x 330908 NSv Unarmored Probe Tip (3/8-24 UNF Thread)
• 1 x 7.0 m Coaxial Cable with ClickLoc Termination
• 1 x Compliance and Calibration Documentation Packet

Mechanical Installation Procedures

• Bore Machining: Drill and tap the equipment housing to accept a 3/8-24 UNF thread, ensuring the mounting face remains perpendicular to the shaft axis.
• Torque Application: Fasten the probe body using calibrated tools to prevent thread galling or mechanical stress on the internal dielectric core.
• Cold Gap Setting: Position the probe tip to achieve a 1.0 mm (40 mils) initial air gap before securing locknuts.
• Routing Protection: Run the 7.0-meter integrated cable through grounded metal conduit to isolate low-level RF signals from industrial noise sources.

Technical FAQ

• Why does the NSv platform use a restricted linear range?

  Specialized electromagnetic shaping focuses the sensing field for small targets and tight counterbores, yielding a 1.5 mm linear span.

• Can this transducer function without a matched Proximitor?

  No, the probe tip requires the radio frequency oscillator circuitry inside the external Proximitor module to translate impedance changes into voltage signals.

• What causes noticeable baseline voltage drift over time?

  Thermal growth of machinery casings, shifting rotor centerlines, or loose mounting hardware typically introduce observable DC voltage shifts.

• Are cable length alterations permitted during installation?

  No, modifying the integral 7.0-meter coaxial cable alters circuit capacitance, breaking factory calibration and distorting vibration amplitude readings.

• What is the purpose of the ClickLoc connector design?

  It provides a secure, lockable coaxial connection while maintaining constant impedance and protecting gold-plated contacts from oxidation.

• Is hot-swapping allowed on live monitoring loops?

  Disconnecting energized sensor circuits during operation can induce voltage transients that trigger spurious machinery protection trips.

• How does target geometry influence measurement linearity?

  Targets must meet minimum diameter requirements; undersized shafts or flat surfaces reduce the linear operating range and flatten sensitivity curves.

• What precautions prevent high-frequency noise interference?

  Grounding the cable shield at a single designated instrument cabinet point prevents ground loops and stabilizes low-level telemetry signals.