Bently Nevada 330104-00-10-10-02-CN 3300 XL Proximitor Sensor – Reliable eddy-current vibration and position measurement for critical rotating assets

The 330104-00-10-10-02-CN is part of the Bently Nevada 3300 XL family and is typically used as the Proximitor Sensor for the 8 mm proximity probe system. Pair it with a 3300 XL 8 mm probe and the matching extension cable to get a stable, -200 mV/mil signal that plants trust for shaft vibration and axial position monitoring.    From my experience, this setup is a go-to choice on turbines, compressors, and large motors where you need dependable readings and easy compatibility with 3300/3500 monitoring racks.

• -200 mV/mil sensitivity (≈7.87 mV/μm): Gives a clean, linear output for both vibration and gap measurements in most standard 8 mm systems.

• Designed for 3300 XL 8 mm system: Works with the 3300 XL probe and extension cable to achieve the specified system length (commonly 5, 7, or 9 m).

• Robust EMI/RFI immunity: Helps keep the signal stable in electrically noisy industrial environments.

• Stable bias (gap) voltage: Easy to verify correct probe installation and machine-to-probe gap during commissioning and routine checks.

• API 670–style compliance: In many cases, used on API-class machinery where consistent linearity and frequency response are expected.

• Compatible with Bently Nevada 3300/3500 monitors: You can typically drop it into existing racks without surprises, which saves time during turnarounds.

• Field-proven durability: The molded module and sealed construction stand up well to heat, oil mist, and vibration near the machine.

You’ll typically find the 3300 XL system on critical rotating equipment where unplanned downtime is simply too expensive. A few examples we’ve seen work well:

• Steam and gas turbines – shaft vibration, eccentricity, and thrust position trending.

• Centrifugal compressors – monitoring for rubs, misalignment, and early balance issues.

• Large motors and generators – bearing housing vibration and shaft relative movement.

• Pumps and fans – condition monitoring in refineries, chemical plants, and power stations.

A reliability engineer at a petrochemical site told me they switched a mixed fleet to 3300 XL sensors during a turnaround. The main win seemed to be consistent readings across units and less time spent on re-gapping during start-ups.

• High compatibility: Pairs seamlessly with Bently Nevada 3300/3500 monitors and standard 8 mm probes, which reduces engineering time.

• Reliable measurement chain: Proven -200 mV/mil output and stable bias voltage help speed up diagnostics.

• Lifecycle cost savings: In many cases, the ability to reuse existing racks, wiring paths, and mounting hardware keeps project spend under control.

• Scalable system lengths: 5/7/9 m options make it easier to route cables in challenging skid layouts without performance surprises.

• Global approvals: Versions are available with common industrial certifications, easing multi-site standardization.

• Mounting: Install the Proximitor Sensor on a rigid, clean surface near the machine. Keep cable runs neat and away from high-voltage lines when possible.

• Cabinet/junction box: A sealed enclosure with good ventilation typically works best; avoid condensation and pooling oil.

• Wiring: Use the designated terminals for probe, extension cable, and monitor connections. Ground/shield as per Bently Nevada wiring practices to minimize noise.

• Gapping and checks: Set the probe gap per the machine drawing; verify bias (gap) voltage on the monitor—this step usually catches most installation issues.

• Routine maintenance: Periodically inspect connectors and cable clamps, clean accumulated dust/oil film, and confirm the monitor scale factor. No firmware updates are needed for the Proximitor Sensor itself.

• Safety: De-energize the circuit before service. Follow site work permits and lockout/tagout procedures, especially in hazardous areas.

• CE marking and RoHS compliance for most variants.

• UL/cUL recognized; ATEX/IECEx options are typically available for hazardous locations (model-dependent).

• Manufactured under ISO 9001 quality systems.

• Standard manufacturer warranty applies; extended coverage may be available on request.

Note: 330104-00-10-10-02-CN denotes a specific option set within the 3300 XL family. If you’re matching an existing installation, share your probe and extension cable part numbers (e.g., 330103 and 330130) and the required system length, and we’ll double-check compatibility before shipping.