Bently Nevada 330903-00-03-10-01-CN – 8mm Eddy Current Proximity Probe | 3300 NSv Platform
Engineering Background
The Bently Nevada 3300 NSv series represents the industry benchmark for non-contacting vibration measurement in rotating machinery protection systems. Engineered to API 670 standards, this eddy current proximity probe system is the preferred choice of reliability engineers and OEM integrators worldwide for continuous shaft vibration, position, and eccentricity monitoring.
Product Positioning
The 330903-00-03-10-01-CN is an 8mm diameter proximity probe designed for use within the 3300 NSv system architecture. It delivers high-resolution, real-time displacement measurements critical for turbine, compressor, pump, and gearbox protection. This CN-suffix variant is optimized for standard target materials and integrates directly with Bently Nevada 3300 series extension cables and proximitor/oscillator drivers.
Complete Technical Specifications
- Part Number: 330903-00-03-10-01-CN
- Series / Platform: Bently Nevada 3300 NSv
- Probe Tip Diameter: 8 mm
- Sensing Technology: Eddy Current (Non-contacting)
- Linear Range: 0.25 mm – 2.25 mm (10 mil – 90 mil)
- Scale Factor: 7.87 V/mm (200 mV/mil)
- Frequency Response: 0 Hz – 10,000 Hz (–3 dB)
- Operating Temperature: –35°C to +177°C (–31°F to +351°F)
- Cable Length: 1.0 m (standard; matched to extension cable)
- Connector Type: Integral coaxial, reverse SMA compatible
- Target Material: AISI 4140 steel (standard); compatible with most ferrous alloys
- Probe Body Material: Stainless steel housing
- Ingress Protection: Suitable for oil-mist and high-humidity environments
- Compliance: API 670 5th Edition; CE marked
- Weight: Approx. 40 g
- Country of Origin: USA (Baker Hughes / Bently Nevada)
Proven Application Environments
- Steam and gas turbine shaft radial vibration monitoring
- Centrifugal and reciprocating compressor protection systems
- Boiler feed pump and large motor bearing displacement
- Gearbox and expander eccentricity and thrust position measurement
- Petrochemical, LNG, power generation, and offshore platforms
- API 670-compliant machinery protection systems (MPS)
Engineering Advantages
- High Signal Fidelity: Consistent 200 mV/mil scale factor across the full linear range ensures accurate vibration amplitude readings without recalibration.
- Broad Frequency Bandwidth: 0–10 kHz response captures sub-synchronous, synchronous, and high-frequency vibration events critical for early fault detection.
- Extreme Temperature Tolerance: Rated to +177°C, enabling direct installation in hot-section bearing housings without thermal derating.
- Plug-and-Play Compatibility: Direct replacement for existing 3300 NSv installations; no reconfiguration of proximitor drivers or monitors required.
- Robust Construction: Stainless steel body and sealed coaxial connector resist oil, steam, and chemical exposure in harsh plant environments.
System Architecture & Signal Flow
The 330903-00-03-10-01-CN operates as the sensing element in a three-component eddy current measurement chain:
- Proximity Probe (330903-00-03-10-01-CN) → generates high-frequency electromagnetic field at the probe tip.
- Extension Cable (330130 series) → transmits the modulated signal from probe to proximitor with minimal loss.
- Proximitor / Oscillator-Demodulator (3300 XL 8mm) → conditions the signal and outputs a DC voltage proportional to gap distance, feeding directly into Bently Nevada 3500 or 3300 series monitors.
Total system gap voltage: –24 VDC nominal supply; output range –2 VDC to –18 VDC across the linear range.
Sourcing & Quality Verification
- Authenticity: All units sourced through verified industrial automation distributors and OEM-authorized channels. Each probe is inspected for physical integrity, connector condition, and cable continuity prior to dispatch.
- Documentation: Factory calibration certificates and material traceability records available upon request for critical-service applications.
- Condition: New surplus and refurbished units available; condition clearly stated on each order confirmation.
- Shelf Life: Stored in climate-controlled, ESD-safe warehouse to preserve sensor calibration and cable insulation integrity.
Procurement Process
- Submit your part number and required quantity via the order form or contact [email protected].
- Receive a formal quotation with lead time, unit price, and shipping options within 1 business day.
- Confirm purchase order; payment via T/T, PayPal, or trade terms for qualified accounts.
- Dispatch within 3–5 business days; DHL / FedEx express available for urgent plant shutdowns.
- Post-delivery technical support provided by Konmask engineering team.
Technical FAQ
Q: Is the 330903-00-03-10-01-CN a direct replacement for the 330903-00-03-05-02-CN?
A: The -10- suffix denotes a 1.0 m probe cable length vs. 0.5 m for -05-. Verify your extension cable length to ensure the total system cable length matches your proximitor calibration.
Q: Can this probe be used with non-Bently Nevada monitors?
A: Yes, provided the third-party monitor accepts a –24 VDC powered eddy current input with 200 mV/mil scale factor. Consult your monitor manufacturer for compatibility confirmation.
Q: What is the recommended gap voltage for initial commissioning?
A: Set the initial gap to –10.0 VDC (±0.5 V), corresponding to approximately 1.27 mm (50 mil) physical gap, which centers the probe in its linear range.
Q: Are calibration certificates included?
A: Available upon request. Please specify at time of order if required for your QA documentation package.
Q: What is the lead time for bulk orders (>10 units)?
A: Typically 5–10 business days depending on stock. Contact us for volume pricing and priority allocation.
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