Bently Nevada 330903-00-12-05-02-CN – High-Precision Proximity Transducer System | 3300 XL Series Platform
Engineering Background
The Bently Nevada 330903-00-12-05-02-CN is a factory-configured proximity transducer system engineered for continuous, non-contact measurement of shaft radial vibration, axial position, and differential expansion in rotating machinery. Designed and manufactured under Baker Hughes’ Bently Nevada instrumentation standards, this system is a core component of the globally deployed 3300 XL Series — the industry benchmark for turbomachinery protection and condition monitoring.
Product Positioning
This transducer system is purpose-built for procurement engineers and reliability teams sourcing OEM-equivalent replacement parts for existing 3300 XL monitoring architectures. It delivers plug-and-play compatibility with Bently Nevada 3300 series monitors, eliminating recalibration overhead and reducing mean-time-to-repair (MTTR) in critical asset protection loops.
Bently Nevada 330903-00-12-05-02-CN – Non-Contact Eddy-Current Proximity Sensing | 3300 XL Series
Complete Technical Specifications
- Part Number: 330903-00-12-05-02-CN
- Series / Platform: Bently Nevada 3300 XL Proximity Transducer System
- Measurement Type: Non-contact eddy-current proximity sensing
- Probe Tip Diameter: 8 mm (standard)
- Cable Length (Probe): 12 inches (305 mm)
- Extension Cable Length: 5 meters
- Connector Type: 02 = standard BNC-compatible termination
- Approvals / Certification: CN = China National certification variant
- Linear Range: 80 mil (2.032 mm) typical
- Sensitivity: 200 mV/mil (7.87 V/mm)
- Frequency Response: DC to 10,000 Hz (–3 dB)
- Operating Temperature: –35°C to +177°C (probe); –35°C to +85°C (driver)
- Supply Voltage: –24 VDC (nominal)
- Output: –2 VDC to –18 VDC (within linear range)
- Target Material: AISI 4140 steel or equivalent ferromagnetic alloy
- Weight: Approx. 140 g (complete system)
- Ingress Protection: IP67 (probe body)
- Compliance: API 670 5th Edition compatible
Proven Application Environments
- Steam and gas turbine shaft vibration monitoring (radial and axial)
- Centrifugal compressor rotor position measurement
- Pump and motor bearing clearance monitoring
- Gearbox differential expansion measurement
- Petrochemical, LNG, and power generation plant machinery protection
- Offshore platform rotating equipment condition monitoring
- Pulp & paper and steel mill drive train surveillance
Engineering Advantages
- API 670 Compliance: Meets the 5th Edition standard for machinery protection systems — mandatory for most EPC and owner-operator specifications.
- Eddy-Current Non-Contact Design: Zero mechanical wear; suitable for continuous 24/7 operation in harsh environments.
- Factory-Matched System: Probe, extension cable, and driver are calibrated as a matched set, ensuring system accuracy without field calibration.
- Wide Frequency Bandwidth: DC to 10 kHz response captures both slow-roll runout and high-frequency sub-synchronous instabilities.
- High-Temperature Probe Rating: Rated to +177°C, suitable for hot-section turbine bearing pedestals.
- CN Certification Variant: Compliant with Chinese national standards for industrial instrumentation — simplifies customs clearance and local regulatory approval.
- Direct Monitor Compatibility: Plug-compatible with Bently Nevada 3300/16 and 3300/20 series monitors; no signal conditioning adapters required.
System Architecture & Signal Flow
The 330903-00-12-05-02-CN operates as a three-component eddy-current system:
- Probe (8 mm tip): Generates a high-frequency electromagnetic field directed at the rotating shaft target. Gap changes modulate the field impedance.
- Extension Cable (5 m): Transmits the modulated RF signal from the probe to the driver/oscillator with controlled impedance characteristics. Cable length is factory-matched to the probe.
- Driver / Oscillator (3300 XL Driver): Demodulates the RF signal and outputs a DC-proportional voltage (–2 V to –18 V) representing the instantaneous gap distance. This output feeds directly into the 3300 series monitor input card.
The monitor processes the voltage signal for vibration amplitude, phase, and position alarms per API 670 setpoint logic.
Sourcing & Quality Verification
- Origin: Sourced from authorized Bently Nevada distribution channels and verified surplus inventory with full traceability documentation.
- Inspection: Each unit undergoes incoming inspection including visual examination, connector integrity check, and impedance verification prior to dispatch.
- Packaging: Ships in original or equivalent ESD-safe packaging with desiccant. Probe tip protected with factory cap.
- Documentation: Certificate of conformance (CoC) and datasheet available upon request. Factory calibration records provided where available.
- Warranty: 12-month operational warranty against manufacturing defects.
Procurement Process
- Step 1 – Inquiry: Submit your RFQ via the product page or email support@konmask.com with your required quantity and delivery timeline.
- Step 2 – Quotation: Receive a formal quotation with lead time, unit price, and shipping options within 1 business day.
- Step 3 – Order Confirmation: Place order via the Konmask.com checkout or via PO for B2B accounts.
- Step 4 – Dispatch: Orders are dispatched within 2–5 business days. Express DHL/FedEx options available for urgent requirements.
- Step 5 – After-Sales: Technical support available post-delivery for installation verification and commissioning queries.
Technical FAQ
- Q: Is the 330903-00-12-05-02-CN compatible with the Bently Nevada 3500 series monitors?
- A: The 330903 series is designed for the 3300 XL platform. While physical connectors may be similar, system calibration constants differ. Consult Bently Nevada compatibility matrices or contact our technical team before cross-platform use.
- Q: What does the “-CN” suffix indicate?
- A: The CN suffix designates the China National certification variant, which meets Chinese industrial instrumentation approval requirements and simplifies import compliance within China.
- Q: Can the probe cable length be extended in the field?
- A: No. The probe and extension cable are factory-matched as a calibrated pair. Field extension of cable length will alter system sensitivity and invalidate calibration. Always order the correct cable length for your installation gap.
- Q: What target material is required for accurate measurement?
- A: The probe is calibrated for AISI 4140 steel. Shafts made from non-magnetic materials (e.g., titanium, Inconel) require a target correction factor. Contact our engineering team for target material compensation guidance.
- Q: Do you provide a Certificate of Conformance?
- A: Yes. A CoC is available upon request at time of order. Factory calibration records are provided where available from our supply chain documentation.
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