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Reverse-mount 8 mm eddy-current proximity probe configuration for machinery vibration and position measurement.
The Bently Nevada 330105 family is identified by the manufacturer as a 3300 XL 8 mm reverse-mount proximity probe with 3/8-24 UNF-2A threads. The probe forms one part of a complete eddy-current proximity transducer system together with the correctly matched 3300 XL extension cable and Proximitor Sensor.
The complete system produces an output voltage proportional to the distance between the probe tip and a conductive target. Manufacturer-listed applications include radial vibration, axial position, Keyphasor reference and speed measurement on fluid-film-bearing machinery.
| Code Element | Manufacturer-Documented Meaning | Verification Status |
|---|---|---|
| 330105 | 3300 XL 8 mm reverse-mount probe, 3/8-24 UNF threads | Confirmed in manufacturer datasheet |
| 02-12 | Standard fixed mechanical configuration used in the public 330105 ordering structure | Manufacturer public ordering pattern is 330105-02-12-CC-DD-EE |
| 10 | 1.0 metre (3.3 ft) total probe length | Confirmed |
| 02 | Miniature ClickLoc coaxial connector with standard cable | Confirmed |
| CN / MOD 165931-01 | Not decoded in the current public 3300 XL 8 mm datasheet | Manufacturer verification required before substitution or installation |
| System Type | Non-contacting eddy-current proximity transducer system |
|---|---|
| Probe Tip Diameter | 8.0 mm (0.31 in) |
| Thread | 3/8-24 UNF-2A |
| Standard Mechanical Dimensions | 5.0 mm unthreaded length; 30 mm case length |
| Probe Tip Material | Polyphenylene sulfide (PPS) |
| Probe Case Material | AISI 303 or 304 stainless steel |
| Cable | 75 Ω triaxial, FEP-insulated standard probe cable |
| Linear Range | 2 mm (80 mil); approximately 0.25 to 2.3 mm from target |
| Recommended Radial-Vibration Gap | −9 Vdc; approximately 1.27 mm (50 mil) |
| Incremental Scale Factor | 7.87 V/mm (200 mV/mil), ±5% for a standard 1 m or 5 m system at 0...45 °C |
| Frequency Response | 0...10 kHz, +0/−3 dB, with up to 305 m (1000 ft) of field wiring |
| Standard Probe Temperature | −52...+177 °C (−62...+350 °F), operating and storage |
| Minimum Cable Bend Radius | 25.4 mm (1.0 in) |
| Recommended Reverse-Mount Torque | 7.5 N·m (66 in·lbf); maximum rated 22.6 N·m (200 in·lbf) |
| Factory Calibration Target | AISI 4140 steel unless otherwise ordered |
A 1 m probe may be used as a complete 1 m probe-only system or combined with the correct extension cable to obtain the system length required by the selected Proximitor Sensor. Do not mix system lengths. Confirm target material, shaft size, probe spacing, cable routing and hazardous-area requirements before commissioning.
Public manufacturer status: The 330105 reverse-mount probe remains listed in Bently Nevada 3300 XL 8 mm Datasheet 141194 Rev. AM.
Discontinuation date: No discontinuation date is stated in the current public manufacturer datasheet.
Replacement model: No catalog-specific replacement for “CN MOD 165931-01” is published in the public datasheet. Do not treat a standard 330105 configuration as a guaranteed MOD replacement without Baker Hughes confirmation.
The following 30 catalog numbers were taken from the customer-supplied Bently Nevada stock list. They are displayed as availability references only; no technical equivalence or substitution is implied.