Configured for high-resolution displacement monitoring in 3500 Machinery Protection Systems, the Bently Nevada 330909-00-60-10-01-05 (330909 Proximity Probe) provides direct physical/electrical execution. This transducer converts the relative gap between the probe tip and a target into a proportional analog voltage signal. It is engineered specifically for applications where small-diameter targets require higher electromagnetic field density than standard 8 mm probes can provide, ensuring accurate capture of radial shaft vibration and axial position.

Suffix Breakdown & Model Matrix

• 330909: 3300 NSv Proximity Probe

• -00: Unthreaded Length option (0.0 inches)

• -60: Case Total Length option (60 mm total threaded case length)

• -10: Total Length option (1.0 meter system length)

• -01: Connector option (Miniature coaxial connector)

• -05: Agency Approval option (Multiple certification compliant)

Hardware Specifications

Mechanical Monitoring & Eddy-Current Precision

The 3300 NSv system requires precise eddy-current probe scaling to ensure measurement accuracy, especially when monitoring small-diameter rotors. Operators must perform gap voltage validation to maintain a nominal -10 VDC target at the mid-point of the linear operating range. This ensures the signal swing is centered, preventing saturation during high-amplitude transient events. Furthermore, rigorous cross-talk suppression must be enforced by maintaining proper physical separation between probe tips; failure to do so allows electromagnetic field coupling, which results in distorted vibration waveforms and erroneous phase-angle data in the 3500 rack.

## Ordering info

• One (1) 330909-00-60-10-01-05 Proximity Probe

• Two (2) 3/8-24 UNF-2A hex locknuts

• One (1) silicone connector protector sleeve

• Compliance documentation and calibration certificate

Field Installation Guidelines

• Thread Engagement: Ensure at least five (5) full thread turns are engaged within the mounting bracket to guarantee structural stability during operation.

• Gap Calibration: Verify the static mechanical gap with a feeler gauge to confirm the target remains within the 1.5 mm linear range throughout all thermal conditions.

• Shield Grounding: Terminate the coaxial cable shield at the designated ground terminal within the Proximitor sensor housing only to avoid ground loops.

• Cable Routing: Route the integral coaxial cable through vibration-isolated conduits; avoid tight bends below the 25.4 mm (1.0 inch) radius limit to prevent impedance degradation.

Dispatch Information

• Delivery time: 2-7 days when payment finish.

• Shipped via DHL/FEDEX/UPS.

• Anti-static industrial packaging used to prevent ESD and impact damage during transit.

Frequently Asked Questions

• Can I use this probe with a standard 3300 XL Proximitor?

  No. The NSv probe has unique electrical characteristics and carrier frequencies; it must be paired with an NSv Proximitor sensor to function correctly.

• What is the consequence of exceeding the 1.5 mm linear range?

  Operation outside the linear range causes signal non-linearity, leading to distorted vibration waveforms and inaccurate amplitude readings in the monitoring system.

• Is this probe suitable for submerged oil service?

  Yes, provided the coaxial connector is protected by the silicone sleeve to prevent conductive fluids from bridging the connector pins and attenuating the signal.

• Why does the probe output voltage increase with distance?

  The probe operates as an inductive oscillator. As the target moves away, inductive loading on the coil decreases, shifting the output voltage toward the -24 VDC supply.

• Can the integral probe cable be shortened?

  No. Changing the cable length alters the tuned circuit impedance, which invalidates the factory calibration and degrades measurement precision.

• How is probe health monitored by the 3500 system?

  The monitor performs continuous gap voltage checks. A voltage outside the -1 VDC to -21 VDC window triggers a "NOT OK" fault, indicating a potential open or short.

• Does the probe tip diameter affect the measurement?

  Yes. The 330909 NSv tip is specifically designed for small-diameter shaft applications, offering better spatial resolution than standard 8 mm probes.

• Can the probe tip be cleaned if it becomes dirty?

  Yes, use a non-residue electronic cleaner. Avoid abrasive materials that could scratch the epoxy face, as this can affect the electrical characteristics.