Bently Nevada 330708-00-24-10-01-05 3300 XL 11 mm Proximity Probes

The Bently Nevada 330708-00-24-10-01-05 3300 XL 11 mm Proximity Probe is a high-precision eddy-current sensor designed to monitor shaft vibration, radial position, and axial movement in critical rotating machinery. Part of the proven 3300 XL series, it offers stable measurements even in harsh industrial conditions such as high temperatures, oil-film environments, and strong electromagnetic fields. Its 11 mm tip provides a wider linear range for larger shaft diameters, while the robust construction ensures reliable performance in power generation, petrochemical, and heavy-process industries where machine protection is vital.

Technical Specifications

Applications

The 330708-00-24-10-01-05 probe is engineered for continuous condition monitoring and protection of critical equipment:

• Steam and Gas Turbines – Detects shaft vibration and axial movement to prevent catastrophic failures.

• Compressors and Pumps – Monitors bearing vibration and rotor stability in high-load applications.

• Generators and Motors – Provides early warning of imbalance or misalignment issues.

• Industrial Fans and Gearboxes – Ensures smooth operation under varying thermal and mechanical stress.

• Petrochemical and Refinery Equipment – Maintains accuracy in corrosive and high-temperature environments.

Advantages

• High Measurement Accuracy

  Provides precise vibration and displacement data across a wide linear range, ensuring dependable machinery diagnostics.

• Robust Environmental Tolerance

  Maintains calibration in extreme temperatures, high humidity, and oily or contaminated atmospheres.

• Excellent EMI/RFI Immunity

  Engineered to resist electromagnetic interference for stable output in electrically noisy plants.

• Seamless System Integration

  Fully compatible with Bently Nevada 3300 XL Proximitor drivers and standard extension cables, reducing installation complexity.

• Long Service Life

  Stainless steel housing and rugged polymer sensing tip ensure durability in continuous industrial service.

FAQ

1. How does the 3300 XL 11 mm Proximity Probe measure shaft vibration?

   It uses eddy-current sensing, generating a magnetic field and detecting changes as the conductive shaft moves, converting these into a precise electrical signal.

2. What is the recommended gap voltage for correct operation?

   The probe typically operates at a –8 V DC gap voltage when set at the specified target distance, ensuring linear measurement response.

3. Which Proximitor drivers are supported?

   It is designed to work with the Bently Nevada 3300 XL series Proximitor drivers for accurate signal conditioning and system calibration.

4. What is the maximum vibration level it can tolerate?

   The probe withstands up to 100 g peak vibration across 10–2000 Hz without affecting measurement accuracy.

5. Is the probe sensitive to oil films on the shaft surface?

   No, the eddy-current technology maintains reliable output even when a thin oil film is present between the probe and the target.

6. What is the frequency response of the probe-driver system?

   It provides a flat frequency response from DC up to 10 kHz, suitable for high-speed rotating machinery monitoring.

7. Does it require special shielding against electromagnetic interference?

   No additional shielding is needed beyond normal installation practices, as the probe incorporates built-in EMI/RFI protection.

8. How is calibration maintained over time?

   Calibration remains stable if the probe, extension cable, and Proximitor driver are used as a matched set and handled according to installation guidelines.

9. Can the probe be used for both radial and axial measurements?

   Yes, it is suitable for radial shaft vibration as well as axial (thrust) position monitoring when correctly mounted.

10. What is the insulation resistance requirement?

    The probe maintains an insulation resistance greater than 100 MΩ at 500 V DC, ensuring reliable electrical isolation in high-voltage environments.