Precision-Engineered Sensor for Compact and High-Reliability Machinery Monitoring
The Bently Nevada 330904-02-20-05-01-00 3300 NSv Proximity Probe is a non-contact eddy-current sensor designed for accurate shaft vibration and position measurement in rotating machinery operating under tight mechanical constraints. As part of the 3300 NSv (Narrow Side View) series, this probe is optimized to deliver stable signal performance even in environments where surrounding metal structures could otherwise distort measurement accuracy.
The NSv platform is widely applied in modern industrial asset protection systems, offering a compact footprint while maintaining high-resolution measurement capability for compressors, turbines, pumps, and other critical rotating equipment. The 02-20 configuration typically indicates a longer case geometry suited for deeper mounting requirements in specialized machine housings.
Technical Specifications
| Specification | Details |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 330904-02-20-05-01-00 |
| Product Series | 3300 NSv Proximity Probe |
| Measurement Principle | Eddy-current non-contact sensing |
| Thread Type | M8 × 1 metric thread |
| Case Length | 200 mm |
| Unthreaded Length | 0 mm |
| Total Cable Length | 1.0 m |
| Connector Type | Miniature ClickLoc coaxial connector |
| Cable Type | 75 Ω FEP insulated coaxial cable |
| Housing Material | AISI 304 stainless steel |
| Probe Tip Material | PPS (Polyphenylene Sulfide) |
| Operating Temperature | -52°C to +177°C |
| Frequency Response | 0–10 kHz |
| Linear Measurement Range | ~1.5 mm (typical NSv system behavior) |
| Recommended Gap | 1.0 mm |
| Approx. Weight | ~0.2–0.5 kg (configuration dependent) |
Industrial Applications
This probe is widely used in rotating equipment condition monitoring and protection systems, including:
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Centrifugal compressors
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Steam turbines and gas turbines
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Turbo-expanders
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High-speed process pumps
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Industrial refrigeration compressors
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Air separation units
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Petrochemical rotating machinery
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OEM skid-mounted equipment packages
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Continuous predictive maintenance systems
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Power generation auxiliary equipment
Its extended case design supports installations requiring deeper probe reach or non-standard mounting geometries.
Key Advantages
◆ Extended Reach Configuration
The 200 mm class design supports deeper installation points inside machinery housings.
◆ Stable NSv Signal Architecture
Reduces measurement distortion caused by nearby metallic structures.
◆ High-Resolution Vibration Monitoring
Provides reliable shaft vibration and displacement data for critical asset protection.
◆ Industrial-Grade Durability
Stainless steel construction ensures resistance to corrosion, vibration, and high-temperature environments.
◆ Consistent Signal Integrity
75 Ω coaxial cable ensures low-noise transmission over long operational cycles.
◆ Designed for Predictive Maintenance
Enables early fault detection and improved asset lifecycle management.
◆ Retrofit and OEM Flexibility
Suitable for both new machine builds and modernization of legacy systems.
Technical FAQs
Q1: What does this probe measure?
It measures shaft vibration and radial displacement without physical contact.
Q2: What does NSv mean?
NSv stands for Narrow Side View, designed to reduce interference from surrounding metallic structures.
Q3: What does the “02-20” configuration represent?
It indicates an extended probe body length (approximately 200 mm class design for deeper mounting applications).
Q4: What is the cable length?
This configuration includes a 1.0-meter integrated coaxial cable.
Q5: What is the thread type?
It uses an M8 × 1 metric threaded mounting interface.
Q6: Which industries use this model?
Oil & gas, petrochemical, power generation, refrigeration, and industrial manufacturing sectors.
Q7: Is it suitable for turbines and compressors?
Yes, it is commonly used in both turbine and compressor monitoring systems.
Q8: Can NSv components be mixed with other systems?
No. Probe, extension cable, and Proximitor sensor must be matched as a complete system.
Q9: What is the main installation consideration?
Proper alignment to the rotating shaft target and correct gap setting are critical.
Q10: What maintenance is recommended?
Periodic inspection of cable integrity, mounting stability, and signal verification.
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