Bently Nevada 330905-00-04-05-02-00 – Eddy Current Proximity Transducer System | 3300 XL Series Platform
Engineering Background: The Bently Nevada 3300 XL Series represents the industry benchmark for non-contact shaft vibration and position measurement in rotating machinery. Deployed across power generation, oil & gas, petrochemical, and heavy industrial sectors, this platform has accumulated decades of field-proven reliability in the most demanding continuous-duty environments.
Product Positioning: The 330905-00-04-05-02-00 is a complete proximity transducer system comprising a matched probe, extension cable, and Proximitor® sensor. It is engineered for direct integration with Bently Nevada 3500 Series machinery protection systems and compatible monitoring racks, delivering calibrated eddy current displacement signals for real-time shaft vibration, eccentricity, and axial position monitoring.
Complete Technical Specifications
| Part Number / SKU | 330905-00-04-05-02-00 |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Series / Platform | 3300 XL Proximity Transducer System |
| Measurement Principle | Eddy Current (Non-Contact) |
| Probe Tip Diameter | 8 mm (standard) |
| Linear Range | 0.25 mm – 2.26 mm (10 mil – 90 mil) |
| Scale Factor | 7.87 V/mm (200 mV/mil) |
| Frequency Response | DC – 10,000 Hz (–3 dB) |
| Supply Voltage | –24 VDC (nominal) |
| Output Signal | –2 VDC to –18 VDC (within linear range) |
| Target Material | AISI 4140 Steel (standard calibration) |
| Extension Cable Length | 5 m (standard, per part number suffix) |
| Probe Cable Length | 0.5 m integral |
| Operating Temperature | –35°C to +177°C (probe); –35°C to +85°C (Proximitor) |
| Ingress Protection | IP67 (probe assembly) |
| Connector Type | MIL-C-5015 (Proximitor output) |
| Approvals / Certifications | CE, ATEX, FM, CSA (intrinsically safe variants) |
| Weight | Approx. 80 g (probe + cable assembly) |
| Country of Origin | USA |
Proven Application Environments
- Steam & Gas Turbines – Continuous shaft radial vibration monitoring per API 670
- Centrifugal Compressors – Rotor dynamic analysis and surge detection
- Pumps & Fans – Bearing journal orbit and eccentricity measurement
- Gearboxes – Gear mesh frequency and lateral vibration trending
- Electric Motors (>1 MW) – Air gap monitoring and rotor position feedback
- Hydro Turbines – Axial thrust and radial position in wet environments
- Reciprocating Compressors – Rider band wear and crosshead displacement
Engineering Advantages
- Factory-Matched System: Probe, cable, and Proximitor® are calibrated as a matched set — eliminates field calibration errors and ensures API 670 compliance out of the box.
- Extended Temperature Range: Probe rated to +177°C enables direct installation in high-temperature bearing housings without thermal isolation hardware.
- High Frequency Bandwidth: DC–10 kHz response captures sub-synchronous instabilities, blade-pass frequencies, and high-order harmonics critical for advanced diagnostics.
- Non-Contact Measurement: Zero mechanical wear on the sensing element — designed for continuous 24/7 operation across multi-year maintenance intervals.
- Direct 3500 Rack Compatibility: Plug-and-play integration with Bently Nevada 3500/40M, 3500/42M, and 3500/44M monitor modules.
- Robust EMI Immunity: Coaxial cable construction with integral shielding rejects electrical noise in VFD-dense and high-voltage switchgear environments.
System Architecture & Signal Flow
The 330905-00-04-05-02-00 operates as a three-component eddy current system:
- Probe (Sensor Head): Generates a high-frequency electromagnetic field (typically 1.0 MHz). As the conductive target (shaft) moves within the linear range, eddy currents induced in the target surface alter the probe’s impedance.
- Extension Cable (5 m): Transmits the detuned oscillator signal from the probe to the Proximitor® with minimal signal degradation. The matched impedance characteristic is critical — substituting non-OEM cables will shift the scale factor and invalidate calibration.
- Proximitor® Sensor (Driver/Oscillator): Demodulates the impedance change into a DC-proportional voltage output (–2 V to –18 V). This signal is directly compatible with Bently Nevada 3500 Series monitor inputs and standard 4–20 mA transmitter interfaces via signal conditioners.
Signal output polarity: More negative voltage = closer target proximity. At the near-gap limit (0.25 mm), output approaches –2 VDC; at the far-gap limit (2.26 mm), output approaches –18 VDC.
Sourcing & Quality Verification
- OEM Traceability: All units sourced through verified industrial distribution channels with documented chain of custody. Counterfeit risk mitigation is a core procurement standard at Konmask.
- Pre-Shipment Inspection: Each unit undergoes visual inspection, label verification (part number, date code, serial number), and connector integrity check prior to dispatch.
- Packaging Integrity: Shipped in original OEM packaging or equivalent ESD-safe protective packaging with desiccant. Probe tip protected with factory cap.
- Documentation Available: Certificate of conformance, calibration data sheet, and OEM datasheet available upon request for critical plant applications.
Procurement Process
-
Confirm Part Number: Verify the full suffix string
330905-00-04-05-02-00matches your system’s Proximitor® driver and cable length requirement. Cross-reference with your Bently Nevada system drawing or TDI (Transducer Data Information) sheet. - Submit Inquiry or Order: Add to cart for standard stock orders, or contact support@konmask.com for volume pricing, expedited shipping, or documentation packages.
- Lead Time: In-stock units ship within 1–3 business days. Ex-stock international orders typically arrive within 5–10 business days depending on destination customs clearance.
- Technical Support: Pre-sales engineering consultation available via email or phone for installation, compatibility, and system integration questions.
Technical FAQ
Q: Can I use a third-party extension cable with this probe?
A: Not recommended. The 3300 XL system is calibrated as a matched set. Non-OEM cables alter the transmission line impedance, shifting the scale factor by up to ±5% and invalidating API 670 compliance. Always use the OEM-matched cable specified in the part number suffix.
Q: Is this system compatible with the Bently Nevada 3500/40M monitor?
A: Yes. The 330905 series Proximitor® output (–2 V to –18 VDC, 200 mV/mil scale factor) is directly compatible with the 3500/40M, 3500/42M, and 3500/44M radial vibration monitor modules.
Q: What is the target material for the standard calibration?
A: AISI 4140 steel. If your shaft material differs (e.g., Inconel, titanium, or stainless steel), a material correction factor must be applied. Contact our engineering team for recalibration options or correction factor data.
Q: Can this probe operate in hydrogen-cooled or submerged environments?
A: The probe assembly is rated IP67 and is suitable for oil-mist and splash environments. For fully submerged or hydrogen-cooled generator applications, consult the Bently Nevada application engineering team for the appropriate probe variant.
Q: What is the maximum gap for initial installation?
A: The recommended initial installation gap is 1.0 mm (40 mil), which places the operating point at the center of the linear range (–10 VDC output). This maximizes the available measurement range in both directions.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
