BENTLY NEVADA 330103-00-04-10-02-05 Proximitor Sensor – Reliable 3300 Series Eddy-Current Measurement for Shaft Vibration and Position

The BENTLY 330103-00-04-10-02-05 is part of the 3300-series Proximitor Sensors commonly used with 3300 XL 8 mm proximity probes and matching extension cables. It’s designed for continuous condition monitoring—shaft vibration, radial/axial position, and thermal growth—feeding clean, linear analog signals into your protection and monitoring system. From my experience, this model is a solid fit when you need stable 200 mV/mil scaling and the proven eddy-current performance Bently Nevada gear is known for.

Company’s Order Placement Process and Guarantees

• Warranty: 365 days
• Delivery: 1 week if in stock; no more than one month at the latest
• Payment: 50% advance payment; full payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• Proximitor signal conditioning – Converts eddy-current probe signal into a linear analog output for vibration and gap.
• 200 mV/mil scaling – Typical 7.87 mV/µm for the 8 mm 3300 XL measurement chain, simplifying calibration.
• Stable gap and dynamic output – Supports both static (gap) and dynamic vibration signals for protection and trending.
• Industrial power tolerance – Typically operates from a -24 Vdc supply used across Bently Nevada proximitor systems.
• Ruggedized design – Built for harsh environments around turbines, compressors, and critical pumps.
• Wide frequency response – Suited for machinery protection monitors where broadband dynamic content matters.
• Shielded coax compatibility – Works with matched 3300 XL probes and extension cables for full system linearity.
• Simple wiring and checks – You might notice that terminal labeling and common test points make commissioning faster.

Technical Specifications

Application Fields

You’ll typically see the 330103 proximitor used on:

• Steam and gas turbines – radial vibration, axial position (thrust), and differential expansion.
• Compressors and expanders – continuous vibration protection and startup/transient monitoring.
• Large motors, pumps, and fans – early fault detection on bearings and rotors to avoid unplanned downtime.
• Gearboxes – trend shaft condition to catch misalignment and gear mesh issues early.
• Refining, petrochemical, and power plants – integrates with protection racks and DCS for trips/alarms.

Advantages & Value

• Reliability – Proven 3300-series performance with stable scaling over temperature and time.
• Compatibility – Works with standard 3300 XL probes and extension cables; easy to integrate with common monitors.
• Cost Control – In many cases, replacing just the proximitor restores full chain accuracy without reworking cabling.
• Traceability – Clear part coding for spares management and simpler audit trails.
• Technical Support – Typical wiring and calibration methods are well-documented, making site acceptance smoother.

A maintenance lead at a gas plant told us their swap to this model “cut our gap-check time in half” because the output came in right on expected voltage, without chasing ground loops.

Installation & Maintenance

• Mounting environment – Install in a sealed cabinet near the machine; allow ventilation and keep away from high-EMI sources.
• Wiring – Use the matched probe and extension cable; maintain shield continuity and single-point grounding to minimize noise.
• Power – Supply a clean -24 Vdc. You might notice that noisy supplies show up as drift in the gap voltage.
• Calibration – Verify 200 mV/mil (7.87 mV/µm) scaling during commissioning; check gap voltage at cold/hot conditions.
• Maintenance – Inspect connectors quarterly, clean terminals, confirm insulation resistance, and review vibration trends for sensor health.
• Firmware/Settings – Not a digital device, but keep monitor/rack configuration aligned with proximitor scaling and polarity.
• Safety – De-energize circuits before handling; observe plant ESD practices for coax connections.

Quality & Certifications

• Typical compliance: CE, RoHS; manufactured under ISO 9001 quality systems.
• Listings/marks may vary by option code and region; documentation is available upon request.
• Manufacturer’s warranty practices apply; our sales warranty coverage is 365 days from delivery.

Supporting Components (for a complete measurement chain)

• 3300 XL proximity probe (8 mm tip) – mounts at the machine to sense the conductive shaft surface.
• 3300 XL extension cable (matched length) – maintains system linearity and phase; select length to suit routing.
• Mounting hardware and brackets – ensure rigid, repeatable probe positioning to avoid amplitude errors.
• Machinery protection monitor – accepts the proximitor’s analog output for alarms, trips, and trending.

If you’re standardizing spares, this model seems to be a safe choice across many assets where 8 mm 3300 XL measurement chains are already installed. If your site has mixed probe types or unusual targets (non-4140 steel), we can double-check system matching before you commit.