Configured for shaft vibration and rotor position measurement in machinery protection architectures, the Bently Nevada 330881-28-00-165-07-02 (330881-28-00-165-07-02 PROXPAC XL Proximity Transducer) provides direct physical/electrical execution.

Part Number Breakdown & Model Matrix

• 330881: PROXPAC XL Proximity Transducer core catalog listing
• 28: 3300 XL 8 mm probe with Multiple Approvals option
• 00: No standoff adapter option
• 165: Minimum probe penetration length of 165 mm option
• 07: One PG21 x M20 fitting and two plugs option
• 02: 3/4-14 NPT mounting thread option

Hardware Specifications

Rotor Dynamics and Gap Voltage Validation

• Integrates eddy-current probe scaling directly with internal Proximitor electronics to map shaft displacement to precise voltage outputs without external cable attenuation.
• Executes gap voltage validation to ensure a stable nominal -10 VDC static operating point during machinery zero-speed checks.
• Suppresses signal cross-talk and electromagnetic interference through enclosed housing shielding and direct internal wiring termination.
• Utilizes a standardized linear range to monitor rotor dynamics, radial vibration transients, and axial position shifts accurately.

Ordering Information

• 2 x 330881-28-00-165-07-02 PROXPAC XL Transducer Assemblies
• 1 x PG21 x M20 Fitting
• 2 x Plugs

Field Installation Guidelines

• Ensure the 3/4-14 NPT mounting thread achieves full engagement according to standard industrial practices to maintain structural rigidity under vibration.
• Route field wiring through metallic conduit terminated at the PG21 x M20 fitting to preserve electromagnetic shielding integrity.
• Torque all housing cover bolts and threaded entry ports uniformly to sustain environmental sealing performance in high-moisture locations.
• Connect the transducer signal common to the designated monitor channel return while ensuring proper system earthing to eliminate ground loops.

Frequently Asked Questions

• What is the primary operational function of this transducer assembly?

  It integrates an 8 mm proximity probe and an internal Proximitor sensor inside a protective enclosure to measure shaft vibration and position.

• Why does this model omit an external extension cable?

  The internal Proximitor design connects the probe tip directly within the housing, routing signal wiring straight to the monitoring system.

• What supply voltage range is required to power the internal sensor?

  The integrated circuit requires an input voltage between -17.5 VDC and -26 VDC with a maximum current draw of 12 mA.

• What output signal range does the transducer deliver?

  It generates a proportional voltage output ranging from -1 VDC to -17 VDC based on the observed target gap distance.

• How should the NPT mounting threads be sealed during installation?

  Apply approved industrial thread sealant and verify correct thread engagement to prevent mechanical loosening or leakage.

• What is the specified probe penetration length for this configuration?

  The probe features a penetration length option of 165 mm tailored for specific machinery clearance requirements.

• What fittings are included for external cabling entry?

  The unit incorporates one PG21 x M20 adapter fitting along with two sealing plugs for unused ports.

• Can standard 3300 XL extension cables be connected to this unit?

  No, the self-contained architecture eliminates the requirement and physical interface points for external extension cables.