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Help CenterBently Nevada 330105-02-12-10-12-05 Proximity Probe for Shaft Vibration and Position
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The Bently Nevada 330105-02-12-10-12-05 is a 3300 XL series 8 mm proximity probe engineered for non-contact measurement of shaft vibration, radial position, and thrust position on critical rotating machinery. From my experience, this is the go-to probe family when you need stable, API 670–grade performance in turbines, compressors, large pumps, and generators.
Pair it with a matched 3300 XL Proximitor Sensor and extension cable to form a calibrated 5 m, 7 m, or 9 m system. You get the classic −200 mV/mil sensitivity and a wide linear range that plant teams rely on for trending, protection, and diagnostics.
Key Features8 mm sensing tip – Suited for standard industrial shaft diameters; supports vibration and position measurements without contact.
−200 mV/mil sensitivity (typical) – When used with a matched 3300 XL Proximitor Sensor, simplifies calibration and compatibility with 3500/3300 monitors.
Linear range up to ~2.0 mm (80 mil) – Plenty of headroom for radial vibration and thrust position on most API-style machines.
High temperature tolerance – Probe and cable materials are designed for hot bearing housings; actual limits depend on cable/armor options.
Rugged, oil-resistant construction – Withstands oil splash, vibration, and common plant contaminants in most cases.
Ordering-code flexibility – The 330105-02-12-10-12-05 code defines probe length, thread style, connection, and armor. Reach out if you want us to verify each code position against your spec.
System length options (5 m / 7 m / 9 m) – Maintains calibrated response across longer runs when matched with the correct extension cable and Proximitor.
Compatible with Bently Nevada monitors – Integrates with 3500, 3300, and similar systems for protection and condition monitoring.
| Brand / Model | Bently Nevada 330105-02-12-10-12-05 |
| Sensing principle | Eddy-current (non-contact) proximity probe, 8 mm tip |
| Sensitivity | −200 mV/mil (≈ −7.87 mV/µm) with matched 3300 XL Proximitor Sensor |
| Linear range (typ.) | Up to ~2.0 mm (80 mil), depending on target material and setup |
| System length | 5 m / 7 m / 9 m (probe + extension cable + Proximitor must be matched) |
| Operating temperature (probe) | Typically −35 °C to +180 °C at the probe tip; cable limits vary by option |
| Power requirements | Powered via 3300 XL Proximitor Sensor (sensor typically powered from −24 Vdc) |
| Signal I/O (system) | Voltage output from Proximitor (−200 mV/mil) to monitoring system |
| Installation method | Threaded mount with locknut; nominal gap typically set near 1.0 mm (40 mil) |
| Compatible components | 330104-XX-XX-10-XX Proximitor Sensor; 3301xx series extension cables (matched length) |
This probe is usually selected for:
Steam and gas turbines – radial vibration and thrust position channels for protection monitors.
Centrifugal and axial compressors – shaft vibration trending for surge and seal health correlations.
Large pumps and fans – condition monitoring where process upsets are frequent.
Gearboxes and generators – detecting misalignment, rubs, and rotor dynamic issues early.
One thing I appreciate is how predictable the 3300 XL response is on standard steel targets; it makes baselining after overhauls a lot smoother. A maintenance manager recently mentioned they cut false alarms after switching to matched 7 m systems on a mixed-fleet compressor line.
Reliability – Stable output over temperature and time reduces recalibration work between turnarounds.
Compatibility – Works cleanly with Bently Nevada 3500/3300 monitors and software. No odd scaling surprises.
Lower lifecycle cost – Durable mechanical design typically outlasts cheaper probes, especially around hot bearings.
Supportable – Clear ordering code and global availability make spares management simple across sites.
Mounting – Use the specified threaded mount and locknut; ensure the probe faces a clean 4140/SAE steel target surface. Set nominal gap near 1.0 mm (40 mil) unless your spec says otherwise.
Cable routing – Avoid tight bends, high-vibration cantilevers, and parallel runs with high-voltage cables. Keep the minimum bend radius per the datasheet.
System matching – Always match probe, extension cable, and Proximitor for the same system length (5 m, 7 m, or 9 m). Mixing lengths degrades accuracy.
Cabinet and environment – Proximitor Sensors should be installed in a ventilated control panel; keep ambient within the sensor’s rated temperature.
Periodic checks – Verify gap after outages, clean the probe face if oil varnish builds up, and confirm monitor scaling (−200 mV/mil) during functional tests.
Safety – For hazardous areas, confirm the exact ordering code supports the required approvals (ATEX/IECEx). Follow lockout/tagout and machine guarding practices.
Designed to meet API 670 system performance when used with matching 3300 XL components.
CE and RoHS compliance for most configurations; hazardous-area approvals (ATEX/IECEx) available depending on code.
Manufacturer’s warranty is typically 1 year; extended service coverage can be arranged upon request.
Bently Nevada 330104-XX-XX-10-XX Proximitor Sensor – Supplies the probe and outputs a scaled voltage to the monitor; choose the version that matches your system length and mounting needs.
Bently Nevada 3301xx Extension Cable – Completes the 5 m / 7 m / 9 m system. Armor options help where routing passes through abrasive or high-temperature zones.
Mounting accessories – Probe brackets, jam nuts, and conduits to meet site standards and ease repeatable gap settings.
If you’d like, send your existing code string and target machine details. We can quickly confirm each code position on 330105-02-12-10-12-05, check temperature margins, and recommend the matching 330104 Proximitor and cable so the whole chain is right the first time.
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