Bently Nevada 330101-00-58-10-02-05 – Proximity Sensor for Vibration and Shaft Displacement Monitoring

The Bently Nevada 330101-00-58-10-02-05 is part of the 3300 XL 5 mm proximity probe family, designed for non-contact measurement of shaft vibration and position in critical rotating machinery.    It pairs with a matching 3300 XL Proximitor sensor to deliver a clean dynamic vibration signal plus a DC gap voltage, which is exactly what API 670–style protection and condition monitoring systems expect.

You might notice that plants typically choose this 5 mm form factor when space is tight around bearings or seals. From my experience, it fits well in gas/steam turbines, compressors, and large pumps where consistent accuracy and mechanical robustness really matter.

• Non-contact eddy-current sensing – Captures radial vibration and shaft position without physical contact, minimizing wear.

• Matched system performance – Designed to work with the 3300 XL Proximitor sensor for stable sensitivity (typically 7.87 mV/μm / 200 mV/mil) and low noise.

• Compact 5 mm tip – Easier to install in tight bearing housings or close to seals where clearance is limited.

• High temperature capability – Probe and cable assembly are typically rated to endure elevated temperatures encountered near bearings.

• Rugged materials – Stainless-steel probe construction with durable PEEK-insulated cable stands up to oil splash and plant environments.

• Common system lengths – Typically configured for 5 m or 9 m total system length when combined with the extension cable and Proximitor.

• API 670-friendly – Signal characteristics align well with modern protection and monitoring systems in accordance with industry practices.

• Backwards-compatible installs – Often drops into existing Bently Nevada 3300 XL hardware with minimal setup changes.

Typical uses include radial vibration monitoring on journal bearings, thrust position on axial probes, and shaft runout checks during startups.    I’ve seen this model used widely on:

• Steam and gas turbines (main bearings, thrust pads)

• Compressors and expanders (radial vibration, shaft position)

• Large pumps and fans (balance and bearing condition)

• Gearboxes and generators (shaft dynamic monitoring)

“We swapped to the 330101 5 mm probes on a compressor retrofit—seems to be less finicky with our tight clearances, and the bias voltage has stayed rock solid,” a maintenance lead told us after a week-long outage.

• Reliability – Stable bias and sensitivity in many cases reduce nuisance trips and re-calibration time.

• Compatibility – Works seamlessly with 3300 XL Proximitor sensors and mainstream Bently Nevada monitors (e.g., 3500 series).

• Procurement simplicity – Standardized option codes for threads, lengths, and armor make spares management easier.

• Lifecycle cost – Long service life and consistent availability typically mean fewer emergency purchases and less downtime.

• Technical support – Well-documented installation and API 670-friendly practices help commissioning teams move faster.

• Mounting – Use a rigid probe bracket or threaded port aligned to the shaft. Set the nominal gap using feeler gauges; verify DC bias at the Proximitor.

• Wiring – Route the coax away from high-voltage cables and VFDs. Keep bends gentle; avoid crushing the cable. Ground per Bently Nevada recommendations.

• Cabinet environment – Install the Proximitor in a ventilated panel or cabinet; typical –24 Vdc supply with clean power. Maintain spacing for heat dissipation.

• Target material – The system is calibrated to AISI 4140 steel; using other metals may require scaling adjustments in the monitor.

• Routine checks – Periodically confirm gap voltage and vibration amplitude against known baselines. Clean probe tips if oil varnish accumulates (carefully, without scratching the tip).

• Firmware/configuration – When tied to digital monitors, keep firmware current and document alarm setpoints after any mechanical adjustment.

• Safety – Lockout equipment before any adjustment. Verify that hazardous area approvals match the site classification before entry.

• CE and RoHS compliance, typically available for the 3300 XL family

• Hazardous area certifications (e.g., ATEX/IECEx, CSA/UL) available depending on option code

• Manufacturing under ISO-certified quality systems

• Standard manufacturer’s limited warranty (commonly 1 year); extended coverage may be available

• 3300 XL Proximitor Sensor (5 mm) – Required driver that powers the probe and outputs DC gap + dynamic vibration.

• 330130 Extension Cable – Coaxial cable to complete the system length (commonly 5 m or 9 m total with probe and Proximitor).

• Monitor Platforms – Bently Nevada 3500 Series or similar systems for protection and condition monitoring.

• Mounting Hardware – Probe brackets, jam nuts, and protective armor (if cable protection is required in harsh routes).