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Help CenterBently Nevada 330106-05-30-05-02-05 Vibration/Displacement Probe for Critical Rotating Machinery
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The Bently Nevada 330106-05-30-05-02-05 is a proximity (eddy-current) probe designed for precise shaft vibration and axial position measurements in harsh, continuous-duty environments. It slots into the 3300 XL transducer system and, when paired with the matching extension cable and Proximitor sensor, delivers a stable, industry-standard scale factor for machine protection and condition monitoring. From my experience, this model is typically selected for steam turbines, compressors, and high-speed pumps where reliability is non-negotiable.
Key FeaturesEddy-current sensing for vibration and position – Non-contact measurement of shaft radial vibration and axial position on conductive targets.
3300 XL system compatibility – Works as part of the probe + extension cable + Proximitor sensor chain commonly used with Bently Nevada 3300/3500 monitoring systems.
Factory-matched system length – The “-30” option denotes a 3.0 m integral probe cable, enabling correct total transducer length when combined with the matching extension cable.
Stable scale factor – In many cases, the system provides 200 mV/mil (≈7.87 mV/μm) when used with the corresponding 3300 XL Proximitor sensor, making it straightforward to trend data across assets.
Rugged construction – Designed for oil-filled machines and high mechanical stress environments; cable and probe body resist common process contaminants.
Flexible mounting – Threaded body and locknut allow precise tip positioning and gap setting in standard brackets or custom probe holders.
| Brand / Model | Bently Nevada 330106-05-30-05-02-05 |
| Transducer Type | Non-contact eddy-current proximity probe (vibration/displacement) |
| System Compatibility | Bently Nevada 3300 XL transducer system (probe + extension cable + Proximitor sensor) |
| Scale Factor (typical) | 200 mV/mil (≈7.87 mV/μm) when paired with the appropriate 3300 XL Proximitor sensor |
| Integral Cable Length | 3.0 m (derived from “-30” option code) |
| Signal I/O | Connects to extension cable; system output (via Proximitor): DC gap + AC vibration voltage |
| Power Requirements | Not applicable for the probe (powered through the Proximitor sensor in the system) |
| Installation Method | Threaded mounting with locknut; typical use in brackets or probe holders at specified gap |
| Operating Temperature | Industrial range; high-temperature options available in the 3300 XL family (specific limit depends on option codes) |
| Dimensions & Weight | Compact probe body; thread and tip style vary by option code (contact us to verify your exact variant) |
You’ll typically see this probe on high-value rotating machines where precise proximity measurements feed into protection trips or condition monitoring software:
Steam and gas turbines – radial vibration, thrust position, and startup/barring monitoring
Centrifugal compressors – shaft vibration and case expansion measurements in API environments
Large motors, generators, and pumps – bearing housing and shaft condition tracking
Gearboxes and blowers – early fault detection where contact sensors struggle
A maintenance supervisor told me they swapped several legacy probes on a hydrogen-cooled generator to 3300 XL units and the biggest gain was “less drift after outages and far less nuisance alarms” — seems to be a common theme when the system length is matched properly.
Advantages & ValueReliability in harsh conditions – Proven performance in oil, heat, and vibration; fewer false trips in most cases.
System compatibility – Plays nicely with Bently Nevada 3300/3500 monitoring platforms and associated software.
Lower lifecycle cost – Stable calibration and interchangeable components help reduce spares and downtime.
Technical support – Clear option codes and documented installation practices make commissioning more predictable.
Environment – Install in a sealed cabinet or junction box when practical; ensure adequate ventilation and keep cable routing away from high-EMI sources.
Mounting – Use the correct thread and locknut; set the nominal gap per the datasheet (you might target a mid-range gap voltage once the Proximitor is connected).
Wiring – Maintain factory-matched system length (probe + extension + Proximitor); avoid mixing cable lengths arbitrarily.
Safety – De-energize the monitor channel before connecting; confirm grounding and shield terminations to prevent noise pickup.
Routine checks – Periodically verify gap voltage, inspect cable armor/strain relief, and confirm scale factor in your monitoring software. Firmware updates apply to the monitor, not the probe itself.
Spare parts – Keep a matching extension cable and the correct 3300 XL Proximitor sensor on hand; I usually see teams stock one full transducer chain per critical bearing.
Manufactured to Bently Nevada quality standards (ISO 9001 at the manufacturer level)
CE compliant; RoHS/REACH alignment typical for the 3300 XL family
UL/CSA certifications generally apply at the monitoring system level (probe is a passive component)
Standard manufacturer warranty, typically 1 year
3300 XL Extension Cable (e.g., 330130 series) – choose length to match the required system length
3300 XL Proximitor Sensor (matched to probe type and total cable length)
Mounting hardware – brackets, adaptors, and locknuts per your machine design
If you need help interpreting the “-05-30-05-02-05” option codes for thread type, tip configuration, or armor, share your existing spec sheet or a photo of the probe tag. You might notice tiny differences in codes that affect temperature rating and mounting depth, and it’s worth getting those right before an outage.
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