Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 330904-04-14-05-02-00 |
| Brand | Bently Nevada |
| Product Type | Eddy Current Proximity Probe |
| Series | 3300 XL NSv |
| Origin | USA |
| Dimensions | M8 x 1 metric thread; 40 mm unthreaded case length; 140 mm overall case length |
| Operating Temp | -51 deg C to +177 deg C |
| Power Consumption | Supplied by compatible Bently Nevada Proximitor sensor system |
| Thread Type | M8 x 1 metric thread |
| Cable Length | 0.5 meter (20 in) |
| Cable Protection | Armored cable construction |
| Connector Type | Miniature coaxial ClickLoc connector with gold-plated contact |
| Linear Range | 1.5 mm (60 mils) typical |
| Measurement Function | Radial vibration, shaft position, axial displacement, keyphasor and speed measurement |
| System Compatibility | Bently Nevada 3300 XL NSv Transducer System |
Eddy-Current Probe Scaling and Rotor Dynamics Monitoring
The 330904-04-14-05-02-00 uses eddy-current measurement technology to convert shaft displacement into electrical output signals for machinery protection and condition monitoring. The probe maintains a calibrated relationship between physical shaft movement and output voltage through the associated Proximitor system.
Additionally, the probe supports rotor dynamics analysis by measuring shaft relative motion in fluid-film bearing applications. The narrow side-view construction allows installation in restricted mechanical locations, including small target areas, counterbores, and limited radial clearance assemblies.
The system requires correct gap voltage validation during installation. Bently Nevada proximity systems typically verify probe operating position near a -10 VDC gap voltage target to maintain measurement accuracy and linear operating range.
Frequently Asked Questions
Q: What measurement functions does the 330904-04-14-05-02-00 support?
A: The probe measures radial shaft vibration, axial position, displacement, keyphasor signals, and rotational speed when connected to a compatible Bently Nevada transducer system.
Q: Can the probe operate in high-temperature machinery environments?
A: Yes. The specified operating temperature range is -51 deg C to +177 deg C, allowing installation near many rotating machinery bearing locations.
Q: What installation factors affect measurement accuracy?
A: Correct probe gap setting, target surface condition, cable routing, and electrical grounding practices affect signal quality and displacement measurement performance.
Field Installation Guidelines
- Install the M8 x 1 threaded probe body with correct mechanical engagement and avoid excessive tightening torque that may damage the probe housing.
- Position the sensing tip toward the target shaft surface with the required mechanical clearance before final calibration.
- Route the armored cable away from high-current power cables and strong electromagnetic interference sources.
- Maintain proper connector cleanliness when installing the miniature coaxial ClickLoc connector.
- Connect the transducer system shield according to site grounding practices to reduce electrical noise.
- Verify the operating gap voltage after installation and confirm the probe output remains within the expected linear measurement range.
- Inspect the target surface condition because scratches, contamination, or irregular geometry can affect eddy-current measurement response.
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