Bently Nevada 330905-00-08-05-02-05 – Eddy Current Proximity Probe | NSv Series / 3300 XL Platform
Engineering Background: The Bently Nevada NSv (Non-contacting vibration) Proximity Probe system is the industry benchmark for continuous shaft vibration and position monitoring in rotating machinery. Engineered to API 670 standards, the 330905 series delivers sub-micron resolution displacement measurement without physical contact, making it indispensable for turbines, compressors, pumps, and gearboxes operating in critical process environments.
Product Positioning: The 330905-00-08-05-02-05 is a fully integrated eddy-current probe configured with an 8 mm tip diameter, 5-metre armored extension cable, and standard 3300 XL driver compatibility. It is the preferred choice for procurement engineers specifying radial shaft vibration channels on new installations or direct OEM-equivalent replacements on existing Bently Nevada 3300 XL monitoring systems.
Complete Technical Specifications
- Part Number: 330905-00-08-05-02-05
- Series / Platform: NSv Proximity Probe System / Bently Nevada 3300 XL
- Sensing Technology: Eddy-current (non-contacting)
- Probe Tip Diameter: 8 mm
- Extension Cable Length: 5 m (armored, integral)
- Linear Range: 0.25 mm – 2.25 mm (10 mil – 90 mil)
- Scale Factor (Sensitivity): 7.87 V/mm (200 mV/mil) nominal
- Frequency Response: DC – 10,000 Hz (–3 dB)
- Supply Voltage: –24 VDC (via 3300 XL driver)
- Output Signal: –2 VDC to –18 VDC (proportional to gap)
- Target Material: AISI 4140 steel or equivalent ferromagnetic alloy
- Operating Temperature: –35 °C to +177 °C (probe body)
- Ingress Protection: IP67 (probe tip and body)
- Connector: Standard BNC / integral armored cable to driver
- Compliance: API 670 5th Edition, CE, RoHS
- Weight: 440 g (probe + cable assembly)
- Country of Origin: USA
Proven Application Environments
- Steam and gas turbine radial shaft vibration monitoring
- Centrifugal and reciprocating compressor journal bearing displacement
- Boiler feed pump and cooling water pump shaft position
- Gearbox and motor shaft eccentricity measurement
- Petrochemical, LNG, power generation, and offshore platforms
- Direct replacement for legacy Bently Nevada 3300 XL proximity probe channels
Engineering Advantages
- API 670 Compliant: Meets the most stringent machinery protection standard for critical rotating equipment.
- High Bandwidth: DC–10 kHz response captures sub-synchronous, synchronous, and super-synchronous vibration components.
- Armored Cable: Stainless-steel braid protects against mechanical damage, EMI, and chemical exposure in harsh plant environments.
- Plug-and-Play Compatibility: Direct electrical and mechanical replacement for existing 3300 XL driver/monitor channels — zero recalibration required when replacing like-for-like.
- Long-term Stability: Eddy-current technology provides drift-free measurement over the full operating temperature range.
- Traceable Calibration: Each unit ships with factory calibration data traceable to NIST standards.
System Architecture & Signal Flow
The 330905-00-08-05-02-05 operates as part of the Bently Nevada 3300 XL three-component proximity system:
- Probe (330905): Generates an oscillating electromagnetic field at the tip; gap change modulates field impedance.
- Extension Cable (integral, 5 m): Transmits the modulated signal from probe to driver with minimal signal loss.
- Driver / Oscillator-Demodulator (3300 XL, sold separately): Converts impedance modulation to a DC voltage output proportional to shaft displacement.
- Monitor (3500/3300 series, sold separately): Processes driver output for alarm, trip, and data acquisition functions.
Signal path: Shaft gap → Probe tip → Extension cable → Driver output (–2 to –18 VDC) → Monitor input → DCS/SCADA
Sourcing & Quality Verification
- Source: Authorized distributor and surplus OEM stock — all units are genuine Bently Nevada / Baker Hughes components.
- Inspection: Each probe undergoes incoming inspection including tip continuity, cable integrity, and gap-vs-voltage linearity verification before shipment.
- Documentation: Certificate of conformance, factory calibration sheet, and datasheet available upon request.
- Warranty: 12-month operational warranty against manufacturing defects.
- Lead Time: In-stock units ship within 2 business days; EX-Works Xiamen, China.
Procurement Process
- Step 1 – Confirm Compatibility: Verify your existing driver model (3300 XL series) and cable length requirement (5 m integral).
- Step 2 – Request Quote: Contact support@konmask.com with your PO number, required quantity, and delivery address for a formal quotation.
- Step 3 – Order Confirmation: Purchase order accepted via email; proforma invoice issued within 24 hours.
- Step 4 – Payment & Shipment: T/T, PayPal, or credit card accepted. Units dispatched within 2 business days of payment clearance.
- Step 5 – Documentation Package: CoC, calibration data, and commercial invoice provided with every shipment.
Technical FAQ
Q: Is the 330905-00-08-05-02-05 compatible with the Bently Nevada 3500 monitoring system?
A: Yes. The NSv probe is electrically compatible with 3500 series monitors when used with the appropriate 3300 XL driver. Confirm driver part number before ordering.
Q: Can this probe be used with non-Bently Nevada drivers?
A: Not recommended. The NSv system is calibrated as a matched set (probe + driver). Using third-party drivers will invalidate the scale factor and may produce inaccurate readings.
Q: What is the target material requirement?
A: The probe is calibrated for AISI 4140 steel. Other ferromagnetic alloys require a correction factor; non-ferromagnetic targets (e.g., titanium, aluminum) are not suitable.
Q: Is recalibration required after installation?
A: No field recalibration is required for direct OEM replacement. A gap-setting procedure per the Bently Nevada installation manual is sufficient.
Q: Do you provide export documentation for international shipments?
A: Yes. Full commercial invoice, packing list, certificate of origin, and ECCN classification are provided for all international orders.
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