BENTLY NEVADA 330106-05-30-05-02-05 – 3300 XL 11 mm Proximity Probe for Large-Span Shaft Vibration and Position Monitoring

The BENTLY NEVADA 330106 is part of the 3300 XL proximity measurement system, engineered for non-contact displacement and vibration monitoring on heavy-duty rotating machinery. From my experience, the 11 mm probe head is the go-to choice when you need a wider linear range and more mechanical robustness than the 5 mm/8 mm versions—typically on steam turbines, large compressors, generators, and hydro units. The specific build code 330106-05-30-05-02-05 appears to indicate a common configuration with defined lead length and approvals, making it a safe replacement in many installed bases.

Our Order Process and Guarantees

Key Features

• 11 mm probe tip, wide linear range – Typically supports a 4 mm (160 mil) linear span with the matched 3300 XL Proximitor sensor, ideal for large-shaft applications.
• Stable eddy-current measurement – Proven -200 mV/mil (≈7.87 mV/µm) system sensitivity with excellent thermal stability when paired with the correct Proximitor.
• Rugged construction – Fluoropolymer jacketed coax and sealed probe assembly for harsh environments; in many cases installed in hot, oily machine areas.
• ClickLoc style coax connectors – Positive locking connections reduce loosening from vibration and make field service quicker.
• Compatible with 3300 XL system – Works with the matching 3300 XL extension cable and Proximitor sensor for standard Bently Nevada displacement measurements.
• Typical approvals build – This code variant commonly carries multi-agency certifications for industrial sites; good for multi-region plants (confirm against your QA list).
• Drop-in retrofit – Dimensions and electrical response are designed to be form/fit/function compatible within the 3300 XL family.
• Designed for proximity, axial thrust, and radial vibration – You might notice it’s frequently used for shaft radial vibration, shaft position, and thrust position probes on large frames.

Technical Specifications

Application Fields

Plants typically install the 330106 on:

• Steam and gas turbines – radial vibration, shaft relative position, and thrust position channels
• Large compressors and expanders – continuous vibration monitoring for API-compliant protection systems
• Generators and motors – sleeve-bearing machines where shaft-relative measurements matter most
• Pumps, fans, blowers – critical service assets tied to process uptime

One thing I appreciate is how forgiving the 11 mm system is for larger target areas and long cable runs. In many cases it reduces nuisance alarms caused by mechanical tolerances on older machines.

Advantages & Value for Procurement

• Reliability – Field-proven 3300 XL architecture with excellent temperature and EMI performance.
• Compatibility – Designed to pair with 3300 XL extension cables and Proximitor sensors, simplifying spares management.
• Lower lifecycle cost – Stable calibration reduces rework and unplanned site visits; retrofit-friendly.
• Technical support – Well-documented behavior and widely trained technicians mean faster commissioning and troubleshooting.

Installation & Maintenance Tips

• Mounting: Use a rigid bracket or threaded port aligned to the shaft; ensure adequate thread engagement and locknut torque.
• Cabinet/Proximitor: Install the Proximitor in a ventilated control cabinet per manufacturer guidance; maintain proper shielding and grounding.
• Wiring: Route coax cables away from high-voltage lines; avoid tight bends and crushing of armor. Use ClickLoc connectors fully seated.
• Gap setting: Set the initial gap per system datasheet (commonly around 1.0 mm) and verify DC gap voltage at the Proximitor.
• Safety: De-energize machinery, lockout/tagout, and confirm no rotating hazards before working near the probe location.
• Routine care: Periodically inspect tip cleanliness, cable integrity, and connector tightness; check calibration drift during planned outages.
• Firmware/Monitoring: If signals are fed to a monitoring rack, apply the correct scaling (e.g., -200 mV/mil) and update rack firmware as needed.

Quality & Certifications

• Manufacturing quality system: ISO 9001 (typical for Bently Nevada production sites)
• Product compliance: CE marking; RoHS conformity for relevant components
• Hazardous area: Many builds include ATEX/IECEx/CSA approvals; this code variant typically aligns with multi-agency needs
• Warranty: 365 days

Recommended Matching Components

• 3300 XL Proximitor Sensor – Required interface that powers the probe and provides the DC/AC outputs for your monitoring system.
• 3300 XL Extension Cable – Coaxial cable between the probe and Proximitor; length and connector style should match your 330106 build code.
• Mounting hardware – Locknuts, brackets, and protective conduits/armor as needed for vibration and environmental protection.