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Help CenterBently Nevada 330105-02-12-05-02-00 Proximity Probe for Precise Shaft Vibration and Position Monitoring
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The Bently Nevada 330105-02-12-05-02-00 is part of the 3300 XL proximity sensing family—widely used on critical rotating machinery where non-contact, high-reliability measurements truly matter. It’s designed for continuous monitoring of shaft vibration, shaft position (gap), and radial runout, typically in turbines, compressors, pumps, and gearboxes.
From my experience, the 3300 XL series stands out for stability over temperature and harsh industrial environments. You might notice that it integrates seamlessly with matching Proximitor sensors and extension cables, keeping total system length and calibration consistent.
Key FeaturesNon-contact eddy-current sensing – Measures shaft vibration and position without physical contact, so no wear on the target surface.
3300 XL system compatibility – Designed to work with matching 3300 XL Proximitor Sensors and extension cables for proper scale factor and linear range.
Stable scale factor – Typically 7.87 mV/µm (200 mV/mil) when paired with the appropriate 3300 XL Proximitor, helping ensure comparable readings across machines.
Harsh-environment build – Probe construction and sealing suited for oil-lubricated bearing housings and industrial cabinets where heat and vibration are common.
Flexible installation – Threaded body and locknut mounting; works with standard brackets, probe holders, and target materials commonly used in rotating equipment.
Backward-compatible monitoring – Typically integrates with 3500 and legacy 3300 rack monitors, plus common transmitters, for both protection and condition monitoring.
| Brand / Model | Bently Nevada 330105-02-12-05-02-00 |
| Product Type | 3300 XL Proximity Probe (eddy-current displacement) |
| Typical Scale Factor | ~7.87 mV/µm (200 mV/mil) with matching 3300 XL Proximitor Sensor (nominal) |
| Measurement Range | System dependent; commonly up to 2.0 mm (80 mil) for 8 mm systems |
| Power Requirements | Probe is passive; powered via the paired 3300 XL Proximitor Sensor (–24 Vdc nominal to the driver) |
| Operating Temperature | Probe typically –51 to +177°C (–60 to +350°F) |
| Signal Input/Output | Coaxial probe-to-driver; Proximitor outputs DC gap voltage + dynamic vibration signal |
| Communication Interfaces | N/A (analog signals via Proximitor; interfaces handled by the monitoring system) |
| Installation Method | Threaded probe with locknut; set mid-gap using Proximitor bias; route coax to extension/driver |
| Dimensions & Weight | Varies by option code; standard threaded body sizes are common within the 3300 XL family |
| Compatible Components | 330180 Proximitor Sensor, 330130 Extension Cable, 3500/3300 monitoring racks |
Typically specified on:
Steam and gas turbines – radial vibration and shaft position on journal bearings
Centrifugal and reciprocating compressors – protection channels and condition trending
Pumps and fans – early detection of rub, misalignment, and looseness
Gearboxes – monitoring gear mesh issues via shaft vibration and runout
Motors and generators – bearing housing probe mounts for continuous surveillance
A maintenance lead at a refinery told me their switch to 3300 XL probes reduced re-gaps during outages—mostly because the system holds its calibration and the cabling is robust in day-to-day work.
Reliability that pays back – In many cases, fewer false trips and fewer rework hours compared to mixed, non-calibrated systems.
System consistency – Probe, extension cable, and Proximitor are factory matched for total length, scale, and range.
Broad compatibility – Works with common Bently Nevada monitors, making spares and field replacements straightforward.
Lower lifecycle cost – Stable performance reduces repeated calibrations; wiring and connectors are designed for industrial handling.
Technical support – Documentation and install guides are mature; most technicians are already familiar with the 3300 XL workflow.
Mounting – Use the threaded body and locknut; align probe tip normal to the shaft surface. Maintain the manufacturer’s recommended standoff to reach mid-gap.
Mid-gap setting – Set using the Proximitor bias voltage (often around the nominal mid-range). Verify linear range with the target material (typically 4140 steel).
Cabling – Keep the specified total system length (probe + extension + driver). Observe minimum bend radius and avoid tight cable trays with strong EMI.
Cabinet & ventilation – House the Proximitor/monitor in a clean, ventilated panel; follow good grounding and shielding practices.
Safety – Lockout/tagout rotating machinery, confirm clearances, and never adjust probes on a running rotor unless your procedures explicitly allow it.
Routine care – Periodically verify bias voltage and sensitivity, check connectors for oil ingress, and retighten locknuts after thermal cycles. Firmware updates apply to the monitoring rack rather than the probe.
Conformity: typically CE; RoHS compliance on most current 3300 XL configurations
Agency approvals: options for hazardous area certifications (e.g., ATEX/IECEx/CSA) depending on the exact option code
Warranty: standard manufacturer warranty (commonly 1 year) on new units
330180 Proximitor Sensor (3300 XL) – required driver for scale and linearity
330130 Extension Cable – factory-matched length to maintain calibration
3500 Series monitor modules – vibration, position, and speed monitoring
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