Compact High-Accuracy Monitoring for Critical Rotating Machinery
The Bently Nevada 330904-04-14-05-02-05 3300 NSv Proximity Probe is a non-contact eddy-current sensor designed for precise vibration and shaft position monitoring in compact or mechanically constrained rotating equipment. As part of the 3300 NSv (Narrow Side View) family, it is optimized to maintain stable signal output even in environments with nearby metallic structures that could otherwise interfere with measurement accuracy.
This configuration is commonly used in industrial machinery protection systems where installation depth, mounting geometry, and reliability requirements are critical. The NSv design is widely applied in compressors, turbines, pumps, and OEM packages where space constraints demand a compact yet robust sensing solution.
Technical Specifications
| Specification | Details |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 330904-04-14-05-02-05 |
| Product Type | 3300 NSv Proximity Probe |
| Measurement Technology | Eddy-current non-contact sensing |
| Thread Type | M8 × 1 metric thread |
| Unthreaded Length | 40 mm |
| Case Length | 140 mm |
| Total Cable Length | 0.5 m |
| Connector Type | Miniature ClickLoc coaxial connector |
| Cable Type | 75 Ω FEP insulated coaxial cable |
| Housing Material | AISI 304 stainless steel |
| Operating Temperature | -52°C to +177°C |
| Frequency Response | 0–10 kHz |
| Linear Measurement Range | ~1.5 mm (typical NSv system behavior) |
| Approx. Weight | ~0.15–1.0 kg (varies by configuration) |
Industrial Applications
This probe is widely deployed in rotating equipment monitoring systems, including:
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Centrifugal compressors
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Gas compressors
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Steam and gas turbines
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Turbo-expanders
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High-speed process pumps
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Refrigeration systems
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Air separation units
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Petrochemical rotating machinery
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OEM skid-mounted equipment
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Continuous condition monitoring systems
Its compact armored design makes it suitable for harsh industrial environments where vibration, temperature, and installation constraints must all be considered.
Key Advantages
◆ Optimized for Tight Mechanical Spaces
Designed for installations where standard proximity probes cannot fit or align properly.
◆ Stable NSv Signal Performance
Reduces measurement distortion caused by surrounding metal structures.
◆ High-Precision Non-Contact Measurement
Delivers reliable shaft vibration and displacement data without physical wear.
◆ Rugged Industrial Construction
Stainless steel body ensures durability in corrosive and high-temperature environments.
◆ Strong Retrofit Capability
Ideal for upgrading legacy monitoring systems with modern NSv technology.
◆ Reliable Long-Term Operation
Built for continuous 24/7 monitoring in critical machinery environments.
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 nearby metallic structures.
Q3: What does “04-14” indicate?
It represents a 40 mm unthreaded length and a 140 mm case length configuration.
Q4: What is the cable length?
This model includes a 0.5 m integrated coaxial cable.
Q5: What is the thread type?
It uses an M8 × 1 metric threaded mounting system.
Q6: Where is it commonly used?
It is widely used in compressors, turbines, pumps, and industrial rotating machinery.
Q7: Is it suitable for harsh environments?
Yes, it is designed for high-temperature and industrial-duty applications.
Q8: Can NSv components be mixed?
No. Probe, extension cable, and Proximitor sensor must be properly matched as a system.
Q9: What is the main installation requirement?
Correct alignment with the rotating shaft target and proper gap setting.
Q10: What maintenance is recommended?
Periodic inspection of cable condition, mounting stability, and signal verification.
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