Bently Nevada 330500-00-00 – Proximitor Sensor for 3300 Series Shaft Vibration and Position Monitoring

The Bently Nevada 330500-00-00 is part of the well-known 3300 proximity transducer system, used to convert eddy-current probe signals into precise vibration and shaft position data for machinery protection monitors. From my experience, this model is typically paired with a matching probe and extension cable and feeds a Bently monitor without needing a separate field power supply. It seems to be a sensible drop‑in when you’re standardizing around 3300/3500 racks and want consistent bias voltage, linearity, and temperature stability in harsh plant environments.

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• Warranty: 365 days
• Lead time: 1 week when in stock; no more than 1 month at the latest
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One thing I appreciate is how straightforward replacement is: in most cases it’s a one‑to‑one swap, quick bias check, and you’re back online. You might notice installation time drops notably if your cabinet wiring follows the original 3300 color code and grounding practice.

Key Features

• 3300 system compatibility: Works with a matched Bently Nevada probe and extension cable to deliver gap and dynamic vibration signals to plant monitors.
• High linearity and stability: Factory-calibrated for consistent shaft position and vibration measurements across typical industrial temperature ranges.
• Robust EMI/RFI performance: Shielded design helps maintain clean signals around VFDs, large motors, and high-current switchgear.
• Monitor-powered: Typically powered from the associated Bently Nevada monitoring system—no separate field PSU required.
• Field-proven reliability: Built for turbines, compressors, and critical pumps where false trips are costly.
• Straightforward replacement: Terminal layout and labeling support fast change-outs during scheduled shutdowns.

Technical Specifications

Application Fields

Used across rotating assets where continuous protection is mandatory:

• Gas/steam turbines and generators for shaft vibration and axial position
• Compressors and expanders in oil & gas and petrochemical service
• Large motors, gearboxes, and critical process pumps
• Paper machines, steel mills, and balance-of-plant equipment

A maintenance lead at a refinery told us they swapped this unit into a mixed 3300/3500 rack environment; the bias settled where expected and the monitor accepted the signal with no rework—exactly what you want during a short outage.

Advantages & Value

• Reliability: Proven performance in high-vibration, high-EMI areas helps reduce nuisance trips.
• Compatibility: Designed to work with Bently Nevada probes/extension cables and plant monitors.
• Lifecycle cost: Stable calibration reduces rework, and retrofit-friendly design cuts downtime.
• Support: From my experience, these are straightforward to commission with standard bias checks and gap targets.

Installation & Maintenance

• Cabinet & wiring: Mount in a ventilated control cabinet; segregate transducer wiring from high-voltage runs; maintain single-point grounding and shield continuity.
• Probe system matching: Use the matched Bently probe and extension cable lengths to keep calibration correct; avoid mixing non-mated components.
• Bias verification: After installation, verify DC gap (bias) at the monitor; typical ranges indicate healthy setup before startup.
• Environmental: Keep within the stated ambient range; avoid moisture ingress and corrosive atmospheres unless protected.
• Routine checks: Inspect terminations during shutdowns, clean connectors, and confirm firmware/monitor configuration aligns with transducer type.

Quality & Certifications

• Manufactured to industrial instrumentation standards; many variants carry CE and UL/CSA recognition for use in control panels.
• RoHS compliance applies in most configurations; documentation available on request.
• Warranty: 12 months (365 days) from shipment under normal use.