Bently Nevada 330103-00-05-05-02-05 – 3300 XL 8 mm Proximity Probe for critical vibration and shaft position measurements

The Bently Nevada 330103 series is the go-to 8 mm proximity probe in the 3300 XL family for non-contact measurement of shaft vibration, radial position, and thrust. From my experience, it’s the probe you pick when you want dependable data for API 670‑style protection systems without rethinking your mounting or wiring. The configuration code 330103-00-05-05-02-05 typically indicates a 3300 XL 8 mm probe build; in many cases the “-05” positions refer to a 5 m integral cable and standard options, which fits most brownfield retrofits. You might notice that it mates seamlessly with 330130 extension cables and 3300 XL Proximitor sensors to deliver the familiar 200 mV/mil (7.87 mV/µm) scale factor.

Our Order Process and Guarantees

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

Key Features

• 3300 XL 8 mm sensing tip – optimized for general-purpose radial vibration and position on medium to large shafts.
• System accuracy you know – with 3300 XL Proximitor sensors, the system provides a nominal 7.87 mV/µm (200 mV/mil) output for reliable, repeatable readings.
• Drop-in compatibility – designed to mate with 330130 extension cables and 3300 XL drivers, simplifying spares management and turnaround work.
• Rugged construction – oil-resistant cable and industrial-grade probe body for harsh environments commonly found around turbines, compressors, and pumps.
• API 670-ready setups – commonly applied in API 670 protection architectures for vibration, shaft position, and thrust monitoring.
• Practical build options – this part number appears to include a 5 m integral cable, which typically suits rack-to-machine distances in most plants.

Technical Specifications

Application Fields

Typical uses include radial vibration and shaft position on critical rotating assets:

• Steam and gas turbines – radial vibration, thrust position, and differential expansion points.
• Centrifugal compressors and turbo-expanders – continuous protection and condition monitoring.
• Large pumps, motors, and generators – radial position, vibration trending, and alarm/shutdown.
• Refining, petrochemical, power generation, steel and paper plants – anywhere API 670 monitoring is standard practice.

Advantages & Value

• Proven reliability – 3300 XL hardware is widely installed; spares swap-in is straightforward during outages.
• Compatibility – works with 330130 extension cables and 3300 XL Proximitor sensors feeding 3500/3701 racks or equivalent monitors.
• Lower risk, faster commissioning – known scale factor and setup steps reduce field tuning time.
• Lifecycle support – easy to standardize across units; one spare covers many machines, which typically cuts inventory carry cost.

Installation & Maintenance

• Mounting: Use the threaded body and jam nuts; maintain a clean, flat target area on the shaft. Typical cold gap is set near mid-scale (around 1.0 mm / 40 mils) unless your spec says otherwise.
• Cabling: Route the integral probe cable and 330130 extension away from high-voltage runs; keep bend radius generous and avoid sharp edges or crush points.
• Driver location: Install the 3300 XL Proximitor in a dry, ventilated cabinet; follow good grounding and shielding practice to minimize noise.
• Safety: Lock-out/tag-out rotating equipment; verify probe tip clearance during alignment and final tightening.
• Routine care: Periodically check gap voltage, inspect cable strain reliefs, clean oil residue from probe tip area, and document baseline readings after outages. Firmware updates apply to the monitoring rack, not the passive probe.

Quality & Certifications

• Certifications: CE; RoHS compliant parts are commonly available in the 3300 XL series; manufacturer operates under ISO 9001 quality systems.
• Compliance: Suitable for API 670 monitoring architectures when paired with compatible drivers and monitors.
• Warranty: 365-day warranty from delivery.

One thing I appreciate is how predictable the setup is in the field. A maintenance lead at a combined-cycle plant told us they swapped these probes during a hot-gas-path inspection and were trending vibration within hours—no surprises with the gap or scale factor. If your goal is to minimize downtime and keep the monitoring system consistent across trains, this build of the 330103 typically makes that simpler.