Product Overview

The Bently Nevada 330704-000-050-10-01-05 is a specialized 11 mm proximity probe assembly from the renowned 3300 XL series. Engineered for critical industrial applications, this transducer provides high-resolution, non-contact measurement of shaft displacement and vibration. The 11 mm probe series is specifically designed for environments where a broader linear range is required compared to standard 8 mm transducers, making it an ideal solution for monitoring large-diameter shafts, low-frequency oscillations, and machinery with wider orbital displacements.

Built for the rigors of power generation and hydrocarbon processing, this probe incorporates Bently Nevada’s proprietary TipLoc design. This mechanical innovation creates an exceptionally robust bond between the sensor tip and the stainless-steel casing, ensuring long-term structural integrity even under high-vibration conditions and rapid thermal cycling. As an API 670 compliant device, the 330704-000-050-10-01-05 is a mission-critical component in Turbine Supervisory Instrumentation (TSI) and vibration monitoring racks, providing the precise data necessary for effective predictive maintenance and automated machine protection.

Technical Specifications

Model Configuration Explanation

The part number 330704-000-050-10-01-05 encodes the specific mechanical and electrical configurations:

• 330704: Base model identifier for the 3300 XL 11 mm proximity probe family.

• 000: Specifies 0 mm of unthreaded length (fully threaded housing).

• 050: Indicates a 50 mm case length for varied mounting depths.

• 10: Denotes a 1.0 meter total system length (probe + cable).

• 01: Connector type and mounting hardware configuration.

• 05: Hazardous area approval certification (e.g., CSA/NRTL/C).

Typical Applications

The 11 mm 3300 XL probe is utilized in environments where high-accuracy displacement measurement is essential:

• Steam and Gas Turbines: Monitoring radial shaft vibration and rotor position in bearing journals.

• Large Centrifugal Compressors: Capturing axial rotor movement to prevent thrust bearing failure.

• Hydroelectric Power Units: Enabling monitoring of slow-speed, massive rotating assets.

• High-Speed Industrial Pumps: Providing diagnostic data for cavitation and impeller imbalance.

• Industrial Gearboxes: Measuring high-load tooth-mesh vibration signatures.

System Compatibility

This probe is fully compatible with the Bently Nevada 3300 XL transducer ecosystem:

• Proximitor Sensors: Compatible with 3300 XL 11 mm Proximitor sensors (must be matched by system length).

• Extension Cables: Requires 3300 XL 11 mm series extension cables to maintain impedance matching.

• Monitoring Hardware: Seamlessly integrates with Bently Nevada 3500 and 3300 series vibration monitoring racks.

• Mounting Hardware: Compatible with 3/4-16 UNF threaded housings, probe brackets, and protective conduit systems.

Installation Guidelines

• Thread Integrity: Inspect machine mounting ports for thread damage; ensure the area is free of chips or debris.

• Gap Setting: Use a precision depth micrometer to set the gap. For standard operation, the target is often -10 VDC at the monitor input.

• Orientation: Install the probe perpendicular to the shaft centerline to ensure optimal eddy-current field linearity.

• Locking: Tighten the provided jam nuts securely to ensure the probe remains rigid under heavy machine vibration.

• Shielding: Route the cable through grounded, dedicated industrial conduit to maximize RFI/EMI protection.

• Connector Engagement: Push and turn the ClickLoc connector until a tactile "click" is felt, ensuring a secure electrical connection.

Product Advantages

• Extended Measurement Range: The 11 mm tip allows for a wider linear range, essential for machines with larger shaft orbits.

• TipLoc Technology: Superior mechanical design prevents probe tip separation and ensures long-term reliability.

• API 670 Standard: Meets the world's most rigorous machine protection standards for reliability and accuracy.

• Chemical Resilience: High-grade FEP-jacketed cables and stainless steel construction provide long life in oil-mist and chemical-exposure environments.

• Signal Fidelity: Reduced electrical noise compared to standard transducers, leading to cleaner data for diagnostic analysis.

Ordering Information

The 330704-000-050-10-01-05 assembly includes all necessary locking nuts and washers. Before ordering, verify that the 1.0 meter system length is appropriate for your installation, and confirm that the hazardous area approval (Suffix 05) matches your site safety requirements. Each unit is factory-calibrated against a 4140 steel target.

Frequently Asked Questions

• Can I pair this 11 mm probe with an 8 mm Proximitor?

  No. 11 mm probes must be paired with 11 mm-specific Proximitors to maintain the calibrated linear range and system accuracy.

• Does the system length (1.0m) include the probe cable?

  Yes. The system length refers to the total path from the probe tip through to the end of the cable assembly.

• What is the benefit of the "000" unthreaded length?

  A fully threaded housing allows for maximum flexibility when adjusting the probe gap during installation in shallow ports.

• Is the probe tip material electrically conductive?

  No, the PPS tip is an insulator, but it holds the internal sensing coil in a fixed position to measure target displacement.

• What does the "05" approval mean?

  It indicates the unit is certified for use in hazardous areas. Always cross-reference this with your facility's safety and zoning requirements.

• Can I splice or extend the integral cable?

  Never. Splicing will alter the electrical impedance, destroying the calibration and risking system failure.

• How do I identify if the probe is damaged?

  Erratic voltage output, open-loop warnings on the monitoring rack, or physical damage to the tip are primary indicators for replacement.

• Is this probe resistant to synthetic turbine oils?

  Yes, the probe body and cable materials are engineered to maintain integrity when exposed to most standard industrial lubricants.