Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 330908-12-31-10-02-00 |
| Brand | Bently Nevada |
| Product Type | Eddy Current Proximity Probe |
| Series | 3300 XL NSv Transducer System |
| Origin | USA |
| Weight | 0.55kg |
| Dimensions | Unthreaded Length: 1.2 in (30 mm); Overall Case Length: 3.1 in (79 mm); Total Length: 1.0 m (39 in) |
| Operating Temp | -51 deg C to +177 deg C (-60 deg F to +350 deg F) |
| Power Consumption | Passive probe element; excitation supplied by compatible Proximitor module |
| Transducer Type | Eddy current proximity probe |
| Thread Type | 3/8-24 UNF-2A |
| Linear Range | 1.5 mm (60 mils) |
| Average Scale Factor | 7.87 V/mm (200 mV/mil) |
| Frequency Response | 0 to 10 kHz (+0, -3 dB typical) |
| Probe Tip Material | Polyphenylene sulfide (PPS) |
| Probe Case Material | AISI 304 Stainless Steel |
| Cable Type | 75 ohm coaxial FEP insulated cable |
| Connector Type | Gold-plated brass miniature coaxial ClickLoc connector |
| Connector Configuration | -02 Miniature coaxial ClickLoc connector, standard cable |
| Agency Approval | None |
Eddy Current Measurement and Rotor Dynamics Characteristics
The 3300 XL NSv proximity probe uses eddy-current sensing technology to measure shaft position changes through electromagnetic field variation. Therefore, the probe provides proportional displacement output for machinery vibration and position analysis.
The probe maintains a defined eddy-current probe scaling value with an average sensitivity of 200 mV/mil. Additionally, the 1.5 mm linear measurement range supports dynamic shaft displacement monitoring in compact mechanical assemblies.
The 3300 XL NSv design supports rotor dynamics analysis by providing non-contact measurement signals from rotating shafts. Furthermore, the narrow side-view construction allows installation where standard radial probes cannot fit because of restricted mounting clearance.
The probe output requires connection to a compatible Bently Nevada Proximitor system for signal conditioning, gap voltage generation, and vibration monitoring functions. Proper gap voltage validation remains necessary during commissioning, with typical Bently Nevada systems using -10 VDC target gap settings for probe operation verification.
Frequently Asked Questions
Q: What measurement principle does the Bently Nevada 330908-12-31-10-02-00 use?
A: The probe uses eddy-current technology to detect shaft displacement changes through electromagnetic field interaction between the probe tip and conductive target surface.
Q: Can the 330908-12-31-10-02-00 connect directly to a monitoring controller?
A: No. The probe requires a compatible Bently Nevada Proximitor module to provide excitation, gap voltage processing, and signal conditioning before connection to a monitoring system.
Q: What installation condition is required for accurate displacement measurement?
A: The probe requires correct mechanical alignment, proper target surface clearance, and shielded cable routing to reduce electrical interference during signal transmission.
Field Installation Guidelines
- Install the probe with the specified 3/8-24 UNF-2A thread engagement and ensure the sensing tip faces the measured shaft surface correctly.
- Maintain clean mechanical contact between the probe mounting thread and machine structure where grounding continuity is required.
- Route the coaxial cable away from high-current conductors, motor power cables, and sources of electromagnetic interference.
- Connect the miniature coaxial ClickLoc connector securely and avoid excessive bending stress on the FEP insulated cable.
- Verify probe gap voltage through the connected Proximitor module before final machinery operation.
- Confirm signal stability during shaft rotation and validate displacement output against the monitoring system configuration.
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