Bently Nevada 330101-00-12-10-02-05 Proximity Probe for Vibration and Axial Displacement Monitoring

The 330101-00-12-10-02-05 is a Bently Nevada 3300-series proximity probe, typically used with a matching 3300 XL Proximitor sensor and extension cable for non-contact shaft vibration and position measurements. It’s a go-to pick for turbines, compressors, large motors, and gearboxes where reliable displacement data drives protection and condition monitoring. From my experience, this series balances long-term stability with field-friendly installation.

• Non-contact eddy-current measurement – Captures dynamic shaft vibration and slow-roll/axial position without touching the shaft surface.

• Calibrated as a system – Intended to be paired with the corresponding 3300 XL Proximitor sensor and extension cable to meet API 670 practices.

• Typical sensitivity 200 mV/mil (≈7.87 mV/μm) – Delivers the standard Bently Nevada scale factor used throughout most rotating equipment monitoring setups.

• Wide linear range – Suitable for most proximity applications on medium to large shafts; you can run it comfortably in the mid-range for stable DC gap readings.

• Industrial-grade cable and tip construction – Designed to handle oil mist, vibration, and temperature swings commonly found in machinery bearing housings.

• Proven compatibility – Works within the 3300 XL system ecosystem (probe + extension cable + Proximitor), making spares planning straightforward.

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This probe is used across critical rotating assets where reliable proximity data is essential. You might notice it specified by reliability teams when moving toward API 670-compliant protection systems.

• Steam and gas turbines – radial vibration and thrust position monitoring

• Centrifugal and reciprocating compressors – shaft vibration and rod drop/position (with suitable mounting)

• Large pumps and fans – bearing housing vibration, shaft orbit analysis

• Generators and large motors – vibration trending and trip protection inputs

• Gearboxes – casing and shaft relative displacement, early fault detection

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• Lifecycle continuity – Fits the well-established 3300 XL architecture; spares, calibration procedures, and tools are familiar to most plants.

• Interchangeability – In many cases, the probe can be swapped without reworking brackets or wiring, assuming like-for-like build codes.

• Cost control – Stable performance reduces nuisance trips and troubleshooting time, which usually pays back quickly on critical machines.

• Technical backing – Broad documentation, API-oriented practices, and readily available field support.

One thing I appreciate is how consistent the DC gap behavior is when you set it mid-range; it makes startups less stressful. A maintenance lead at a refinery told us their team standardized on this series because “it just stays in spec,” even after outages and re-route of cabling.

• Cabinet and wiring – Use standard industrial enclosures for the Proximitor; provide clean power and proper shielding/grounding. Keep probe/extension cable away from high-voltage runs where possible.

• Mounting – Rigid probe brackets with the correct thread and projection. Maintain perpendicularity to the shaft and ensure a clean target surface.

• Gap setting – Set the DC gap to the recommended mid-range value for the chosen system (commonly near the center of its linear range). Verify with the Proximitor output during commissioning.

• Ventilation & environment – Avoid cable pinch points and hot spots; if routed through high-temperature zones, choose the proper cable jacket/armor build code.

• Routine checks – Inspect connectors, look for cable abrasion, and confirm scale factor with known runout or a calibrated shaker as needed. Firmware updates apply to the monitoring rack, not the probe.

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• Designed to support API 670 measurement practices when used as a complete 3300 XL system

• Typically CE marked; RoHS compliant materials used in most build codes

• UL/CSA approvals may apply to associated Proximitor and system hardware (varies by configuration)

• Manufacturer’s limited warranty (commonly 1 year); serial-number traceability for each component

• 3300 XL Proximitor Sensor – Provides power, linearization, and the analog output (vibration + DC gap). Mounts in a field enclosure or instrumentation cabinet.

• 3300 XL Extension Cable – Factory-terminated cable linking the probe to the Proximitor; select length to suit routing while maintaining system calibration.

• Probe mounting hardware – Brackets, locknuts, and sealing glands that match the probe thread and insertion depth; choose armored options where mechanical protection is needed.

Note: The full build code (330101-00-12-10-02-05) defines specific mechanical and cable options. If you’re matching an installed base, sharing your existing tag/build code helps confirm exact thread, length, and jacket/armor before we ship. It seems to save surprises during shutdowns.