Bently Nevada 330908-00-20-10-02-05 – Eddy Current Proximity Probe & Extension Cable | 3300 XL Series
Engineering Background
The Bently Nevada 3300 XL Series represents the industry benchmark for non-contacting vibration and position measurement in rotating machinery protection systems. Developed by Baker Hughes (Bently Nevada), the 3300 XL proximity transducer system is engineered to API 670 standards and is deployed globally in turbines, compressors, pumps, and generators where continuous shaft monitoring is mission-critical.
Product Positioning
The 330908-00-20-10-02-05 is a factory-matched proximity probe and extension cable assembly within the 3300 XL ecosystem. This assembly provides the complete signal path from the shaft surface to the Proximitor® sensor, ensuring calibrated eddy-current response, minimal signal attenuation, and full system interchangeability. It is the preferred choice for procurement engineers requiring a drop-in replacement or new installation component with traceable OEM specifications.
Complete Technical Specifications
| Part Number | 330908-00-20-10-02-05 |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Series / Platform | 3300 XL Proximity Transducer System |
| Component Type | Proximity Probe & Extension Cable Assembly |
| Sensing Technology | Eddy Current (Non-contacting) |
| Probe Tip Diameter | 8 mm (standard 3300 XL) |
| Linear Range | 0.25 mm – 2.26 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 (probe); –35°C to +85°C (cable) |
| Supply Voltage | –24 VDC (nominal) |
| Output Voltage Range | –2 VDC to –18 VDC |
| Cable Length | Per part number suffix (02 = 2 m extension) |
| Connector Type | Integral coaxial, reverse-polarity protected |
| Target Material | AISI 4140 steel (standard calibration) |
| Ingress Protection | IP67 (probe body) |
| Compliance | API 670, CE, RoHS |
| Weight | Approx. 13.6 kg (packaged) |
| Country of Origin | United States |
Proven Application Environments
- Steam and gas turbine shaft radial vibration monitoring
- Centrifugal and axial compressor rotor position measurement
- Boiler feed pump and cooling water pump protection systems
- Generator rotor eccentricity and differential expansion monitoring
- Gearbox and motor bearing displacement measurement
- API 670-compliant machinery protection panels (MPS, System 1)
- Petrochemical, LNG, power generation, and offshore platforms
Engineering Advantages
- Factory-matched assembly: Probe and extension cable are calibrated as a system, eliminating field-matching errors and ensuring specification-grade accuracy.
- API 670 compliance: Meets the most stringent international standard for machinery protection instrumentation, accepted by major EPC contractors and end-users worldwide.
- Wide temperature tolerance: Probe body rated to +177°C, suitable for high-temperature bearing housings without derating.
- Non-contacting measurement: Zero mechanical wear, no lubrication required, continuous operation without maintenance intervals.
- Direct OEM interchangeability: Drop-in replacement for existing 3300 XL installations; no recalibration of the Proximitor® sensor required when replacing like-for-like.
- Robust coaxial cable: Armored extension cable resists EMI, mechanical abrasion, and chemical exposure in harsh plant environments.
System Architecture & Signal Flow
The 330908-00-20-10-02-05 operates as part of the three-component 3300 XL transducer system:
- Proximity Probe (330908 series) — Mounted in the bearing housing, the probe tip generates a high-frequency electromagnetic field. Eddy currents induced in the rotating shaft surface modulate the field, producing a voltage proportional to the gap distance.
- Extension Cable (integral to this assembly) — Transmits the modulated signal from the probe to the Proximitor® sensor with minimal loss. The matched impedance and capacitance of the cable are pre-characterized at the factory.
- Proximitor® Sensor (sold separately, e.g., 3300 XL 8 mm) — Demodulates the signal and outputs a calibrated DC voltage to the monitoring system (e.g., Bently Nevada 3500 rack).
This architecture ensures the complete signal chain is traceable to a single calibration certificate, simplifying documentation for safety-instrumented systems (SIS) and functional safety (IEC 61511) audits.
Sourcing & Quality Verification
- Inventory status: In-stock units available for immediate dispatch from Konmask.com verified inventory.
- Traceability: Each unit is inspected against OEM datasheet parameters prior to shipment. Calibration records and factory documentation available upon request.
- Packaging: Original OEM packaging or equivalent ESD-safe packaging with individual part number labeling.
- Warranty: 12-month operational warranty against manufacturing defects. Extended warranty options available for volume orders.
- Export compliance: ECCN classification reviewed; export documentation provided for international shipments.
Procurement Process
- Submit RFQ — Contact [email protected] or call +0086 19859288691 with your required quantity and delivery timeline.
- Quotation & Lead Time — Receive a formal quotation within 24 hours including unit price, freight options, and estimated delivery.
- Purchase Order — Issue PO against the quotation. We accept T/T wire transfer, L/C, and major credit cards.
- Inspection & Dispatch — Units are inspected, documented, and dispatched via DHL / FedEx / UPS with full tracking.
- After-Sales Support — Technical support available post-delivery for installation verification and system commissioning queries.
Technical FAQ
Q: Can this probe be used with a non-Bently Nevada Proximitor® sensor?
A: Not recommended. The 3300 XL probe and cable are calibrated specifically for Bently Nevada Proximitor® sensors. Use with third-party oscillators may result in out-of-specification scale factors and void calibration traceability.
Q: What is the maximum cable run from probe to Proximitor® sensor?
A: The total system cable length (probe integral cable + extension cable) must not exceed the specification for the matched Proximitor® sensor, typically 5 m or 9 m depending on the sensor model. The 330908-00-20-10-02-05 includes a 2 m extension cable.
Q: Is recalibration required after replacing this assembly?
A: When replacing with an identical part number (like-for-like), recalibration of the Proximitor® sensor is not required. A functional verification (gap voltage check) is recommended per API 670 commissioning procedures.
Q: What target materials are supported?
A: Standard calibration is for AISI 4140 steel. For non-standard target materials (e.g., Inconel, titanium), a material correction factor must be applied. Contact our technical team for guidance.
Q: Can you provide a Certificate of Conformance (CoC)?
A: Yes. A CoC is available for all units upon request at the time of order placement.
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Contact: [email protected] | +0086 19859288691
