Bently Nevada 330101-00-08-20-02-05 – Eddy Current Proximity Probe | 3300 XL Series Platform
Engineering Background: The Bently Nevada 3300 XL Series represents the industry benchmark for non-contacting eddy current measurement in rotating machinery protection systems. Developed by Baker Hughes (Bently Nevada), this platform is deployed globally in gas turbines, steam turbines, compressors, and pumps where continuous shaft vibration and position monitoring is mission-critical.
Product Positioning: The 330101-00-08-20-02-05 is an 8 mm diameter proximity probe engineered for high-sensitivity radial vibration, axial position, and differential expansion measurement. It integrates seamlessly with the 3300 XL proximitor/extension cable ecosystem, making it the preferred choice for OEM replacement and system expansion in API 670-compliant machinery protection installations.
Complete Technical Specifications
- Part Number: 330101-00-08-20-02-05
- Series / Platform: Bently Nevada 3300 XL
- Probe Diameter: 8 mm
- Sensing Technology: Eddy Current (Non-contacting)
- Cable Length: 2.0 m (integral cable)
- Extension Cable Compatibility: 3300 XL Series (330130 / 330180)
- Proximitor Compatibility: 3300 XL 8mm Proximitor (330180)
- Linear Range: 0.25 mm – 2.25 mm (10 mil – 90 mil)
- Scale Factor: 7.87 V/mm (200 mV/mil) nominal
- Frequency Response: DC – 10,000 Hz (–3 dB)
- Operating Temperature: –35°C to +177°C (–31°F to +350°F)
- Supply Voltage: –24 VDC (from proximitor)
- Output Voltage Range: –1 VDC to –21 VDC
- Target Material: AISI 4140 steel (standard); other alloys require calibration verification
- Connector Type: Integral coaxial, armored cable
- Ingress Protection: IP67
- Compliance: API 670 4th Edition, CE Marked
- Weight: ~50 g
- Manufacturer: Bently Nevada (Baker Hughes)
- Country of Origin: United States
Proven Application Environments
- Gas turbine radial shaft vibration monitoring (API 670)
- Steam turbine axial position and differential expansion measurement
- Centrifugal compressor rotor dynamic analysis
- Pump and motor bearing proximity sensing
- Gearbox and expander shaft orbit measurement
- Petrochemical, LNG, power generation, and offshore platforms
Engineering Advantages
- Non-contacting measurement: Zero mechanical wear; continuous operation without maintenance intervals
- High linearity: ±1% linearity across full measurement range ensures accurate vibration amplitude data
- Wide temperature range: Qualified for high-temperature turbine environments up to 177°C
- Direct OEM replacement: Pin-compatible with existing 3300 XL installations; no recalibration required when replacing like-for-like
- API 670 compliant: Meets machinery protection standard for critical rotating equipment
- Armored cable construction: Resistant to mechanical damage, oil, and chemical exposure in industrial environments
System Architecture & Signal Flow
The 330101-00-08-20-02-05 probe operates as part of a three-component eddy current measurement chain:
- Proximity Probe (330101-00-08-20-02-05): Generates oscillating electromagnetic field; detects target displacement via impedance change
- Extension Cable (330130 / 330180 series): Transmits RF signal from probe tip to proximitor with matched impedance
- Proximitor / Signal Conditioner (330180-51-00): Converts RF signal to DC voltage output proportional to gap distance; feeds monitoring system (e.g., 3500 rack)
Output signal is a negative DC voltage: larger gap = more negative voltage. Standard gap voltage at mid-range: approximately –10 VDC at 1.0 mm gap.
Sourcing & Quality Verification
- Source: Konmask.com sources from authorized distributors and verified OEM surplus channels
- Inspection: Each unit undergoes visual inspection, connector integrity check, and documentation review prior to dispatch
- Traceability: Original manufacturer labeling and part number markings preserved; no remarking or rebranding
- Warranty: 90-day functional warranty against defects in materials and workmanship
- Certification documents: Available upon request (CoC, test reports where applicable)
Procurement Process
- Confirm part number 330101-00-08-20-02-05 matches your system’s cable length and connector configuration
- Verify target material compatibility (standard calibration for AISI 4140; alternative targets require scale factor adjustment)
- Submit RFQ or place order directly via Konmask.com
- Lead time: In-stock units ship within 1–3 business days; ETA confirmed at order
- Export documentation (commercial invoice, packing list, COO) provided for international shipments
Technical FAQ
Q: Is this probe compatible with the Bently Nevada 3500 monitoring rack?
A: Yes. When paired with the appropriate 3300 XL proximitor (e.g., 330180-51-00), the output signal is fully compatible with 3500 series monitor inputs.
Q: Can I use this probe with a non-steel target?
A: The standard calibration is optimized for AISI 4140 steel. Stainless steel, titanium, or aluminum targets will shift the scale factor; a target-specific calibration curve must be applied.
Q: What is the maximum shaft speed this probe can monitor?
A: The 10 kHz frequency response supports shaft speeds up to approximately 600,000 RPM for 1× vibration detection, well beyond typical turbomachinery operating ranges.
Q: Is the probe interchangeable with the older 3300 (non-XL) series?
A: No. The 3300 XL series uses a different proximitor and is not backward-compatible with the original 3300 series without system-level reconfiguration.
Q: Do you provide ATEX/IECEx certified versions?
A: Bently Nevada offers ATEX-rated variants under different part numbers. Contact us to confirm the correct hazardous-area part number for your zone classification.
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