Introduction — Extended-Cable Precision for Distributed Machinery Monitoring
The Bently Nevada 330103-00-13-20-12-05 3300 XL 8mm Proximity Probe is a high-reliability eddy-current sensor designed for continuous measurement of shaft vibration and position in rotating machinery. As part of the 3300 XL 8mm proximity transducer system, it delivers stable, repeatable performance in demanding industrial environments such as turbines, compressors, pumps, and generators.
The “-20” configuration typically indicates an extended cable length option, making this probe especially suitable for installations where sensors must be routed over longer distances to Proximitor modules or centralized monitoring racks, while maintaining signal integrity and API-aligned performance characteristics.
Technical Specifications
| Parameter | Specification |
|---|
| Model | 330103-00-13-20-12-05 |
| Series | 3300 XL 8mm Proximity Probe |
| Measurement Principle | Eddy-current, non-contact sensing |
| Probe Diameter | 8 mm |
| Thread Type | M10 × 1 |
| Case Length | ~130 mm (extended configuration) |
| Cable Length | ~2.0 m system configuration (long-reach variant) |
| Connector Type | Miniature coaxial ClickLoc system |
| Housing Material | Stainless steel (AISI 303/304) |
| Tip Material | PPS (Polyphenylene sulfide) |
| Operating Temperature | -52°C to +177°C (system dependent) |
| Linear Measurement Range | ~0.25 mm – 2.3 mm |
| Recommended Gap | 1.27 mm (50 mils) |
| Weight | ~0.32–0.33 kg |
Applications — Optimized for Large-Scale Industrial Installations
This probe is widely used in condition monitoring systems for critical rotating assets:
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Gas and steam turbine vibration monitoring
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Centrifugal compressor shaft displacement measurement
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Pump radial vibration and bearing condition tracking
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Generator rotor dynamic behavior analysis
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Gearbox health monitoring in continuous process industries
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Keyphasor and speed reference systems
Its extended cable architecture makes it especially suitable for large facilities where monitoring systems are centralized and sensors are distributed across wide physical areas.
Technical FAQs
1. What does the “20” in the model represent?
It typically indicates an extended cable length configuration (commonly around 2.0 meters).
2. What system is this probe part of?
It is part of the Bently Nevada 3300 XL 8mm proximity transducer system.
3. What measurement technology does it use?
Eddy-current non-contact displacement sensing.
4. What is the probe diameter?
8 mm sensing tip.
5. What is the case length?
Approximately 130 mm in this configuration.
6. What is the operating temperature range?
Approximately -52°C to +177°C depending on system setup.
7. What is the recommended air gap?
1.27 mm (50 mils) for optimal linear response.
8. Can it measure vibration and position?
Yes, it supports both dynamic vibration and static shaft position monitoring.
9. What industries commonly use it?
Power generation, oil & gas, petrochemical, and heavy industrial sectors.
10. Why is long cable length important?
It enables flexible installation in large plants where sensors must connect to remote monitoring systems.
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