BENTLY NEVADA 330104-06-13-10-01-CN – 3300 XL 8 mm Proximity Probe for precise shaft vibration and position monitoring

The BENTLY NEVADA 330104-06-13-10-01-CN is part of the 3300 XL 8 mm eddy‑current proximity probe family, commonly paired with the 330105 extension cable and the 330106 Proximitor sensor. From my experience, this combo is the go-to for API 670–style vibration and shaft position measurements on critical turbomachinery. You might notice that the “CN” suffix typically indicates a China-market variant (labeling/RoHS alignment), while the core measurement performance stays consistent with the 3300 XL series.

Our Order Placement Process and Guarantees

Key Features

• 8 mm probe tip – A proven geometry that balances linear range and resolution for most rotating equipment.
• Matched 3300 XL system – Designed to be used with 330105 extension cables and the 330106 Proximitor for calibrated, stable readings.
• Industry-standard sensitivity – With the Proximitor, you typically get 200 mV/mil (≈7.87 mV/µm) for displacement and shaft condition diagnostics.
• Robust in harsh environments – The probe assembly is built for high temperatures and oil-rich machine cavities, helping it survive outages and long run cycles.
• API 670–style measurements – Suitable for shaft vibration, axial position, and radial clearance measurements in API environments when used as a complete system.
• CN variant labeling – Typically aligned with China RoHS/marking expectations; measurement performance remains consistent with global 3300 XL specs.

Technical Specifications

Application Fields

This probe is typically applied on steam and gas turbines, compressors, pumps, fans, gearboxes, generators, and motors. Common use cases include shaft radial vibration, axial position (thrust), radial clearance, and once-per-rev timing when used with a keyphasor target. One thing I appreciate is how the 3300 XL stack holds calibration through outages, so plants can swap a probe during a turnaround and bring the machine back up without chasing new baselines.

Advantages & Value

• Reliability under heat and oil – The probe’s construction handles hot bearings and splash zones far better than general-purpose sensors.
• Compatibility – Works within the established 3300 XL ecosystem; good for drop-in replacements and mixed-fleet plants.
• Cost control – Minimizes re-engineering and re-cabling; in many cases you reuse the existing extension and Proximitor if the codes match.
• Technical backing – Clear bias and gap checks simplify commissioning and troubleshooting for maintenance teams.

A maintenance lead at a petrochemical site told me they replaced several 330104 probes during a planned outage; the channels came back within a couple of mils of historical baselines, so they didn’t need a full recalibration—just a quick bias verify and runout check.

Installation & Maintenance

• Environment – Mount in a rigid, threaded port aligned to the shaft target; use standard machine cabinet routing with good ventilation and EMC practices.
• Gap and bias – Set the mechanical gap per machine drawing; verify Proximitor bias voltage sits in the recommended window before startup.
• Wiring – Keep cable bend radius generous; maintain shield continuity; avoid parallel runs with high‑power cables.
• Safety – Lockout/tagout; ensure machine is at zero energy state before probe insertion or extraction.
• Routine care – Periodically clean the probe tip and target area, check bias trends, and confirm tightness of locknuts. Firmware updates apply to monitors, not the passive probe.

Quality & Certifications

• Certifications – CE; RoHS (the CN variant typically aligns with China RoHS/marking).
• Standards – Suitable for API 670–style measurements when used with compatible 3300 XL components.
• Warranty – 365 days from delivery.

Recommended Complementary Parts

• Bently Nevada 330105 – 3300 XL extension cable (length to match probe code)
• Bently Nevada 330106 – 3300 XL 8 mm Proximitor sensor
• Standard probe mounting hardware and locknuts per machine drawing