High-Precision Compact Sensor for Critical Rotating Machinery
The Bently Nevada 330903-00-04-05-02-CN 3300 NSv Proximity Probe is a compact eddy-current non-contact sensor designed for accurate shaft vibration and position measurement in machinery where installation space is limited. As part of the 3300 NSv (Narrow Side View) family, it is optimized to reduce sensitivity to nearby metallic structures while maintaining stable and repeatable measurement performance in continuous industrial operation.
This model is widely used in predictive maintenance systems for compressors, turbines, and high-speed rotating equipment. Its compact M8 × 1 metric design makes it especially suitable for OEM equipment and retrofit installations where traditional probes cannot be easily fitted.
Technical Specifications
| Specification | Details |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 330903-00-04-05-02-CN |
| Product Series | 3300 NSv Proximity Probe |
| Measurement Principle | Eddy current, non-contact |
| Thread Type | M8 × 1 metric |
| Unthreaded Length | 0 mm |
| Case Length | 40 mm |
| Cable Length | 0.5 m |
| Connector Type | Miniature ClickLoc coaxial |
| 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 |
| Approx. Weight | ~0.04–0.4 kg (varies by configuration) |
Industrial Applications
This probe is commonly deployed in machinery protection and condition monitoring systems such as:
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Centrifugal compressors
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Process gas compressors
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Industrial refrigeration systems
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Turbo-expanders
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Small steam turbines
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Compact gas turbines
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High-speed pumps
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Air separation units
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OEM skid-mounted packages
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Predictive maintenance platforms
Its compact form factor makes it particularly effective in high-density machinery layouts and retrofit modernization projects.
Key Advantages
◆ Optimized for Tight Installation Spaces
Designed for machinery where clearance limitations prevent the use of standard proximity probes.
◆ Stable Non-Contact Measurement
Eddy current sensing ensures reliable vibration and displacement monitoring without mechanical wear.
◆ Reduced Side-View Interference
NSv design minimizes distortion from nearby metallic structures, improving signal consistency.
◆ Industrial-Grade Durability
Stainless steel construction and PPS probe tip provide strong resistance to harsh environments.
◆ Predictive Maintenance Ready
Enables early fault detection, supporting condition-based maintenance strategies.
◆ Retrofit-Friendly Design
Compact dimensions simplify upgrades on legacy rotating equipment.
◆ Continuous Operation Reliability
Built for long-term 24/7 monitoring in mission-critical 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, a design that reduces interference from nearby metal surfaces.
Q3: What is the main advantage of the M8 design?
It enables installation in compact machinery where standard 8 mm systems are too large.
Q4: Why is case length important?
The 40 mm case length defines mounting depth and clearance requirements in confined housings.
Q5: What cable type is used?
A 75 Ω FEP insulated coaxial cable designed for stable signal transmission.
Q6: Can it be used in compressors?
Yes, it is widely used in centrifugal and process gas compressors.
Q7: Is it suitable for high-temperature environments?
Yes, it supports operation up to +177°C depending on system configuration.
Q8: Can components be mixed with other systems?
No, probe, cable, and Proximitor sensor must be matched as a complete system.
Q9: What industries use this probe?
Oil & gas, petrochemical, power generation, refrigeration, and manufacturing.
Q10: What is the main maintenance requirement?
Periodic inspection of cable integrity, mounting stability, and calibration verification.
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