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Bently Nevada 330106-05-30-50-02-00 – 3300 XL 5 mm Proximity Probe for Compact Bearing Locations
The 330106 is part of Bently Nevada’s 3300 XL proximity sensing family, built for precise, non‑contact measurements of shaft vibration and position. This 5 mm probe is typically selected where space is tight—small bearing housings, narrow windows, or when you need a finer tip near small targets. From my experience, it delivers the expected 3300 XL stability when paired with the correct extension cable and Proximitor sensor, making it a safe choice for API‑670 style protection on critical rotating machines.
Key Features
- 5 mm probe tip – Ideal for confined spaces and smaller targets while maintaining robust eddy‑current performance.
- Matched 3300 XL system – Designed to be used with a matching extension cable and Proximitor sensor for calibrated accuracy.
- Protection‑grade output – When used as a system, it typically provides a nominal 200 mV/mil (≈7.87 mV/µm) scale factor for vibration and position.
- Rugged, plant‑ready build – Materials and construction handle oil mist, vibration, and thermal cycling common around sleeve bearings.
- Flexible mounting hardware – Works with common brackets, probe holders, and adjustable mounts used on turbines, compressors, and large pumps.
- Hazardous‑area variants – Many option codes support ATEX/IECEx/CSA approvals; availability depends on the specific build.
Technical Specifications
| Brand / Model | Bently Nevada 330106-05-30-50-02-00 (3300 XL 5 mm Proximity Probe) |
| Sensor Type | Non‑contact eddy‑current proximity probe (5 mm tip) |
| System Scale Factor | Typically 200 mV/mil (≈7.87 mV/µm) with the correct 3300 XL Proximitor and extension cable |
| Measurement Uses | Radial shaft vibration/position; thrust (axial) position; clearance monitoring |
| Signal Input/Output | Probe connects to a 3300 XL extension cable; the Proximitor provides the conditioned output to the monitor |
| Power Requirements | Passive probe; powered indirectly by the matched Proximitor sensor |
| Installation Method | Threaded probe mounting in a rigid holder or bracket; cold‑gap set by bias voltage and mechanical target |
| Operating Temperature | Per 3300 XL probe ratings; commonly specified for industrial cabinets and bearing housings (confirm by option code) |
| Option String Note | The code “‑05‑30‑50‑02‑00” appears to define mechanical thread/case, integral cable length, intended system length, connector/armor style, and special options. Please match these to your installed Proximitor and extension cable to preserve calibration. |
Bently Nevada 330106-05-30-50-02-00
Application Fields
You’ll typically see the 330106 used on compact bearings or where access is limited, without compromising protection:
- Centrifugal and reciprocating compressors – radial vibration on tight bearing caps and seal areas
- Gas/steam turbines – thrust position and radial vibration where smaller probe geometry is preferred
- Large pumps and fans – proximity measurements for API‑670 alarming and trips
- Motors, generators, and gearboxes – shaft dynamics for condition monitoring and startup checks
Bently Nevada 330106-05-30-50-02-00
Advantages & Value
- Reliability – The 3300 XL family is known for thermal stability and long‑term calibration consistency.
- Compatibility – Works seamlessly with Bently Nevada 3500/3701/Adapt systems via the Proximitor’s outputs.
- Lower lifecycle cost – Fewer nuisance alarms when the probe, cable, and Proximitor are correctly matched and gapped.
- Serviceable design – Technicians value the predictable bias voltage and straightforward cold‑gap adjustment.
A maintenance lead put it simply: “The 5 mm probe fit where the 8 mm wouldn’t. We matched the system length, set bias near mid‑range, and the readings settled in fast.”
Installation & Maintenance
- Mounting & gap – Use a rigid holder aimed at a smooth, flat shaft surface. Set the cold gap to position the Proximitor bias in the recommended range, then record runout.
- System matching – Match probe, extension cable, and Proximitor type and system length; mixing components typically alters scale factor.
- Cable routing – Follow bend‑radius guidance; segregate from high‑energy cabling and add strain relief at the holder.
- Grounding & shielding – Terminate shields as per Bently Nevada practices to keep low‑level signals clean.
- Routine checks – Inspect tip cleanliness, verify bias/OK during outages, and re‑torque hardware after thermal cycles.
- Spares – Keeping an identical option code on the shelf usually shortens recovery after accidental probe damage.
Bently Nevada 330106-05-30-50-02-00
Quality & Certifications
- CE and RoHS conformity for electronic assemblies (region dependent)
- Hazardous‑area approvals (ATEX/IECEx/CSA) available on specific options
- Manufactured under ISO 9001 quality systems
- Manufacturer’s warranty typically 1 year; extended service programs in many cases
If you can share the installed Proximitor and extension cable part numbers, I’ll confirm the “‑05‑30‑50‑02‑00” option mapping and system length before shipment. That quick check typically prevents calibration surprises later.
