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Phone: +86 16626708626Description
3. Key Technical Specifications
- Probe Diameter: 50 mm (1.97 in)
- Total Length Option: 9.0 meters (29.5 feet) per configuration
- Case Type: Straight exit or side exit variants
- Linear Range: Extended for large shafts
- Temperature Range: Standard XL ratings (probe dependent)
- Connector: Miniature coaxial ClickLoc
- Compatibility: 3300 XL 50 mm Proximitor Sensor and extension cables
- Mounting: Threaded or smooth case options
- Target Material: Ferrous (standard calibration)
- Armor Option: Per -05 suffix
4. Product Introduction
The Bently Nevada 330876-03-90-00-05 is a 3300 XL 50 mm proximity probe for monitoring large diameter shafts in heavy rotating machinery.
This large-diameter probe provides accurate vibration and position data where standard 8 mm or 5 mm probes lack sufficient range. It is commonly used on steam turbines, generators, and other large equipment. The XL series improvements give better linearity, temperature stability, and RFI/EMI resistance compared to older 50 mm systems.
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No gap voltage | Probe or cable not connected | High | Measure output at Proximitor | Check all ClickLoc connections |
| Low sensitivity | Gap too large | High | Verify gap within linear range | Reposition probe closer to target |
| Noisy signal | Cable damage or poor grounding | Medium | Inspect cable jacket and grounds | Replace damaged cable sections |
| Temperature related drift | Exceeded ratings | Low | Monitor probe temperature | Confirm application fits probe specs |
| Installation binding | Incorrect thread engagement | Low | Check mounting torque | Follow datasheet thread engagement guidelines |
Send probe photos, gap voltage readings, and system details to support if needed.
- 330876-03-90-00-05
- 330876-03-90-00-05
6. Frequently Asked Questions (FAQ)
What shaft sizes is the 50 mm probe for? Large diameter shafts where greater linear range is required, such as on utility turbines and generators.
Does it require a specific Proximitor? Yes, pair with the matching 3300 XL 50 mm Proximitor Sensor and compatible extension cable.
What is the total system length? Probe length plus extension cable must equal the rated length for your Proximitor (typically 5 m or 9 m systems).
Is it reverse mount? No, this model uses standard straight or side exit configurations depending on exact options.
Is this New Surplus? New Original / New Surplus. Probes are factory calibrated and sealed.
How do I calibrate or gap it? Use a voltmeter at the Proximitor output and set to the midpoint of the linear range for the target material.
What about warranty and availability? 1-year warranty. 50 mm probes are specialized—provide your full system requirements for current stock and lead time.
