Overview
Configured for non-contact measurement of shaft position and vibration in the 3300 XL 8 mm Proximity Transducer System, the Bently Nevada 330104-00-24-05-02-00 (330104 3300 XL 8 mm Proximity Probe) provides direct physical sensing of the gap between the probe tip and a conductive target. The probe uses an eddy-current measurement principle and provides a nominal scale factor of 7.87 V/mm.
Suffix Breakdown & Model Matrix
| Code | Specification |
|---|---|
| 330104 | 3300 XL 8 mm Proximity Probe, M10 x 1 thread, armored construction |
| -00 | Unthreaded length option: 0 mm |
| -24 | Overall case length option: 240 mm |
| -05 | Total cable length: 0.5 m |
| -02 | Miniature coaxial ClickLoc connector with standard cable |
| -00 | Agency approval option: not required |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 330104-00-24-05-02-00 |
| Base Model | 330104 |
| Brand | Bently Nevada |
| Series | 3300 XL 8 mm |
| Product Type | Proximity Probe |
| Measurement Principle | Eddy-current proximity measurement |
| Probe Tip Material | Polyphenylene sulfide (PPS) |
| Probe Case Material | AISI 303 or 304 stainless steel (SST) |
| Seal | Viton O-ring |
| Thread Size | M10 x 1 |
| Linear Range | 2.0 mm (80 mils) |
| Typical Operating Gap | Approximately 0.25 to 2.3 mm |
| Incremental Scale Factor | 7.87 V/mm (200 mV/mil) nominal |
| Frequency Response | 0 to 6.5 kHz (+0, -3 dB) |
| Connector | Gold-plated brass ClickLoc miniature coaxial connector |
| Cable Length | 0.5 m |
| Case Length | 240 mm |
| Target Material | Calibrated standard for AISI 4140 steel |
| Target Calibration | Other target alloys require custom calibration |
| Operating Temp | -51 deg C to +177 deg C |
Eddy-Current Scaling and Gap Voltage
The probe operates as part of a complete eddy-current transducer chain with a compatible Proximitor Sensor and extension cable. The probe detects changes in the electrical gap between its tip and the conductive target.
The stated nominal incremental scale factor is 7.87 V/mm, equivalent to 200 mV/mil. Therefore, mechanical shaft displacement produces a proportional electrical output through the associated Proximitor circuitry.
For field verification, technicians can check the DC gap voltage at the Proximitor output against the system calibration reference. A typical Bently Nevada installation uses a negative DC gap-voltage relationship, commonly centered around a -10 VDC target for the nominal operating gap. The exact acceptance value should follow the applicable transducer-system calibration documentation.
Frequently Asked Questions
Q: What target material does the 330104-00-24-05-02-00 use for calibration?
A: The supplied specification identifies AISI 4140 steel as the calibration standard. Other target alloys require corresponding custom calibration.
Q: What is the electrical scale factor of this probe system?
A: The specified nominal incremental scale factor is 7.87 V/mm, or 200 mV/mil.
Q: Can the probe operate independently without a Proximitor Sensor?
A: No. The probe forms part of an eddy-current transducer chain and requires a compatible Proximitor Sensor and associated extension cable for signal conditioning and measurement.
Field Installation Guidelines
- Install the probe with the specified M10 x 1 threaded connection and maintain the required mechanical alignment with the conductive target.
- Set the probe-to-target gap according to the applicable 3300 XL 8 mm transducer calibration requirements.
- Keep the probe axis aligned with the intended measurement surface to avoid mechanical measurement errors.
- Route the probe cable away from high-current power conductors and strong electromagnetic interference sources where practical.
- Maintain the cable and ClickLoc connector in a mechanically protected position. Avoid excessive bending, pulling, or torsional loading at the connector.
- Connect the probe to the compatible Proximitor Sensor using the specified transducer-system configuration.
- Verify the DC gap voltage and signal scaling after installation before placing the measurement channel into service.
- Use AISI 4140 steel as the reference target condition unless the system has been calibrated for another target alloy.
- Bond cable shielding and grounding according to the applicable Bently Nevada installation documentation and site grounding scheme.
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