Configured for precision displacement monitoring and shaft vibration analysis in industrial rotating machinery, the Bently Nevada 330881-28-06-155-03-02, also cataloged as the 330881 3300 XL NSV Proximity Transducer, operates as a dedicated hardware component for eddy-current proximity measurement within machinery protection frameworks.

Suffix Breakdown & Model Matrix

• Base Model Number: 330881 (3300 XL NSV PROXPAC XL Transducer Assembly)
• Full Catalog String: 330881-28-06-155-03-02
• Metric Configuration: Incorporates metric threading and dimensional layout parameters
• Application Scope: Non-contacting vibration and axial position measurement on specialized metallic shaft targets

Hardware Specifications

Rotor Dynamics and Transducer Measurement Mechanics

• Eddy-Current Probe Scaling: High-frequency radio frequency circuitry excites the probe coil, generating a linear voltage output proportional to the air gap distance between the sensor tip and the conductive rotating shaft surface.
• Gap Voltage Validation: Technicians must verify that the initial static operating point achieves exactly -10 VDC using a calibrated multimeter during mechanical alignment to ensure linear response across the dynamic range.
• Cross-Talk Suppression: Spatial isolation and high-frequency modulation design prevent electromagnetic interference when multiple proximity assemblies are installed adjacently on shared machinery casings.
• Rotor Dynamics Monitoring: Translates mechanical shaft radial vibration, axial position displacement, and speed changes into high-fidelity electrical inputs for continuous machinery protection monitors.

Ordering Info

• 1 x 330881-28-06-155-03-02 PROXPAC XL Proximity Transducer Assembly Base
• 1 x Integrated 3300 XL NSV Probe Tip and Internal Proximitor Sensor Module
• 1 x Associated Terminal Housing Cover, Grounding Liner, and Metric Mounting Hardware Kit

Mechanical Installation Guidelines

• Housing Torque Limits: Tighten internal structural fasteners and metric locknuts according to specified engineering torque limits to maintain stability under continuous operational vibration.
• Gap Distance Setting: Adjust the mechanical probe position until the multimeter output registers a stable -10 VDC target voltage before securing the locking mechanisms.
• Conduit and Cable Routing: Terminate field wiring through certified metric cable glands, keeping signal lines physically separated from high-voltage motor leads to prevent noise coupling.
• Grounding Compliance: Ensure internal grounding shields and housing enclosures are bonded correctly to machinery earth reference to preserve electromagnetic compatibility.

Frequently Asked Questions

• What is the total nominal weight of the PROXPAC XL metric assembly?

  The typical system weight is approximately 1.44 kg.

• What probe architecture is integrated into this model code?

  It utilizes a 3300 XL NSV proximity probe configuration designed for specialized metallic targets and restricted mounting spaces.

• What is the target static gap voltage during initial setup?

  Installers must adjust the mechanical position until the output multimeter registers a -10 VDC reading.

• What DC supply voltage drives the internal Proximitor sensor?

  The unit operates on a negative DC supply voltage ranging between -17.5 VDC and -26 VDC.

• What thread standard governs this specific hardware variant?

  This part number incorporates metric threading and dimensional layout parameters.

• What scale factor does the transducer output provide?

  It provides a standard incremental scale factor of 3.94 V/mm, equivalent to 100 mV/mil.

• What environmental operating temperature range is supported?

  The assembly is rated to function reliably across ambient temperatures from -35 deg C to +85 deg C.

• What primary machinery parameters does the sensor monitor?

  It tracks rotor radial vibration, dynamic shaft orbits, and axial thrust position.