The Bently Nevada 330910-05-25-10-02-00, also cataloged as the 330910 Proximity Probe, operates as a dedicated hardware component for high-frequency vibration and axial displacement monitoring within 3300 NSv system platforms.

Model Suffix Configuration

• 330910: 3300 NSv 5 mm proximity probe series.

• 05: 5 mm probe tip diameter and thread specification.

• 25: 25 mm unthreaded case length.

• 10: 10 mm total case length.

• 02: Miniature coaxial connector interface.

• 00: Standard agency approval classification.

Hardware Specifications

Mechanical Monitoring and Signal Validation

This probe utilizes eddy-current induction to measure the distance between the probe tip and a conductive target. To ensure accurate rotor dynamics analysis, the system must undergo gap voltage validation; the nominal operating setpoint is -10 VDC at the center of the linear range. Effective cross-talk suppression is achieved by adhering to specific installation spacing requirements to prevent interference from adjacent probe RF fields. Calibration integrity requires the use of system-matched extension cables to maintain the required impedance profile for the 3300 NSv transducer system.

Ordering Information

• 330910-05-25-10-02-00 Proximity Probe

• Integrated miniature coaxial connector

• Stainless steel locknuts

• Technical documentation and factory calibration report

Field Installation Guidelines

• Mounting: Utilize a rigid, properly tapped mounting bracket to secure the probe, ensuring it is centered relative to the target shaft.

• Gap Setting: Use a precision feeler gauge to establish the physical gap; verify the output voltage at the Proximitor sensor terminal using a high-impedance digital multimeter.

• Grounding: Maintain shield continuity through to the Proximitor sensor terminal block; ensure the shield is grounded at the Proximitor end only to avoid ground loops.

• Cabling: Route coaxial cables through grounded metal conduit. Avoid bends with radii less than 25 mm to prevent impedance shifts and signal attenuation.

Technical FAQ

1. What material targets are supported?

   The system is factory-calibrated for AISI 4140 steel. Alternative target materials require a change in the transducer scale factor and field recalibration.

2. What is the probe sensitivity?

   The 3300 NSv system is calibrated for a scale factor of 7.87 V/mm (200 mV/mil).

3. What causes unstable gap voltage?

   Unstable voltage readings are typically caused by electrical ground loops, damaged coaxial cable shielding, or excessive radio-frequency interference in the environment.

4. How is probe health tested?

   Probe health is assessed by verifying the loop resistance, coaxial shield integrity, and confirming the DC gap voltage remains within the expected linear operating range.

5. Can the probe operate in hazardous environments?

   The "00" suffix indicates standard industrial approval. Consult localized hazardous area installation drawings and safety guidelines before deployment.

6. What extension cables are compatible?

   Only Bently Nevada 3300 NSv series extension cables are compatible. The use of 3300 XL (8 mm) system components will result in significant measurement errors.