Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 330905-00-25-05-01-CN |
| Brand | Bently Nevada |
| Product Type | 3300 NSv Proximity Probe |
| Origin | USA |
| Dimensions | 250 mm case length, M10 x 1 metric thread |
| Operating Temp | -51 deg C to +177 deg C |
| Power Consumption | Supplied by Proximitor Sensor, -17.5 VDC to -26 VDC |
| Measurement Principle | Non-contacting eddy current sensing |
| Linear Range | 1.5 mm (60 mils) |
| Scale Factor | 7.87 V/mm (200 mV/mil) nominal |
| Target Material | AISI 4140 steel calibration target |
| Recommended Gap Setting | 1.0 mm (40 mils) |
| Connector Type | Miniature coaxial ClickLoc connector with connector protector |
| Cable Length | 0.5 meter |
| Probe Construction | Stainless steel case with PPS probe tip |
| Thread Configuration | M10 x 1 fine metric thread, without armor |
| Output Resistance | 50 ohm |
| Hazardous Area Approval | NEPSI approval |
Eddy Current Probe Scaling and Rotor Dynamics Monitoring
The 3300 NSv probe uses an eddy current sensing principle to convert shaft position changes into proportional electrical output signals. Therefore, the probe provides a nominal scale factor of 7.87 V/mm for displacement measurement.
The system requires correct gap voltage adjustment through the connected Proximitor Sensor. Additionally, Bently Nevada vibration monitoring applications typically validate probe gap conditions around -10 VDC targets to maintain measurement accuracy.
The compact 3300 NSv mechanical design supports installation on machines with limited radial clearance, small shaft diameters, and restricted axial target areas. Furthermore, the probe configuration minimizes installation constraints while maintaining compatibility with rotor dynamics analysis systems.
Frequently Asked Questions
Q: What measurement signals does the Bently Nevada 330905-00-25-05-01-CN provide?
A: The probe provides non-contact displacement signals based on eddy current measurement. The connected Proximitor Sensor converts these signals for vibration, position, and axial displacement monitoring.
Q: Can the 330905-00-25-05-01-CN operate without a Proximitor Sensor?
A: No. The probe requires a compatible Proximitor Sensor to supply excitation power and process the eddy current measurement signal.
Q: What installation factors affect measurement performance?
A: Correct probe gap setting, target material condition, cable routing, and mechanical alignment affect signal stability and measurement accuracy.
Field Installation Guidelines
- Install the probe with the specified M10 x 1 metric thread engagement and confirm mechanical alignment with the target surface.
- Adjust the probe gap according to the connected Proximitor Sensor installation requirements.
- Route the miniature coaxial cable away from high-current conductors and strong electromagnetic interference sources.
- Maintain the minimum cable bend radius to prevent mechanical damage to the cable assembly.
- Verify the connector protector installation before commissioning in industrial environments.
- Confirm hazardous area requirements before installing the NEPSI-approved configuration.
- Check the probe output and gap voltage during commissioning to verify correct signal generation.
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