The Bently Nevada 330881-28-00-110-03-02, also cataloged as the 330881 Proximity Transducer, operates as a dedicated hardware component for non-contacting vibration and displacement measurements within PROXPAC XL Series machinery monitoring platforms.

Model Suffix Configurations

• 330881: Base Model Number for PROXPAC XL Proximity Transducer System

• -28: 8 mm probe thread with 3/8-24 UNF thread profile

• -00: Unthreaded length option specified as 0.0 in

• -110: Case length option specified as 11.0 in

• -03: Total system length option specified as 0.5 m (1.6 ft)

• -02: Agency approval option indicating multi-certification for hazardous areas

Core Technical Parameters

Transducer Scaling and Rotor Dynamics Calibration

This PROXPAC XL Series hardware assembly relies on precise eddy-current probe scaling to convert physical dynamic distance into analog voltage. During commissioning, gap voltage validation requires setting the target static voltage to -10 VDC, corresponding to the midpoint of the linear calibration curves for standard 8 mm rotor dynamics tracking. Cross-talk suppression is integrated via specific internal coil shielding, preventing electromagnetic interference from adjacent eddy-current fields when multiple transducers are positioned in close proximity on the same bearing housing plane.

Procurement Package Inventory

• One (1) integrated PROXPAC XL transducer assembly with internal 8 mm probe

• Concrete installation hardware kit including silastic sealant and anti-seize lubricant

• Silicon rubber connector protection sleeve for field termination isolation

• Factory calibration datasheet documenting baseline cross-talk suppression and scaling variables

Field Layout and Mechanical Alignment

Prior to permanent mechanical lockdown, the internal probe must be threaded into position using a calibrated voltmeter to verify the target -10 VDC gap voltage under static rotor conditions. Secure the outer housing to the machinery casing using a standard NPT thread profile, ensuring a minimum of 5 full thread engagement rounds to maintain pressure containment and structural integrity under high-vibration loads. Signal transmission lines require 100% isolated conduit runs with single-point shield grounding at the monitor rack instrumentation bulkhead to eliminate potential ground loop currents.

Logistics and Dispatch Criteria

Delivery time: 3-5 days when payment finish through DHL/FEDEX/UPS. All shipments are dispatched inside specialized anti-static industrial packaging complete with dense moisture-absorbent desiccants and custom-molded high-density polyethylene protective foam inserts to safeguard electrical and mechanical calibrations during transit.

Structural Performance FAQ

Q: How does total system length affect the output calibration?

A: The probe and internal matching cable are calibrated to specific length matrices. Altering or cutting the 0.5 m system cable ruins the eddy-current probe scaling, inducing non-linear voltage errors across the measurement scale.

Q: Is this module capable of hot-swap intervention while the machinery is operating?

A: The physical housing and probe cannot be extracted during machine operation due to pressure and mechanical alignment constraints. However, the electrical loop connection to the external Proximitor can be disconnected without interrupting other active monitoring channels on the backplane.

Q: What indicates an out-of-tolerance gap alignment during installation?

A: If the measured gap voltage reads less than -2.0 VDC or greater than -18.0 VDC, the transducer is positioned outside its calibrated linear range, meaning the system will flag an immediate NOT OK diagnostic status.