Bently Nevada 330904-00-07-50-02-00 – Non-Contact Shaft Vibration Measurement | 3300 XL NSv Proximity Transducer System
Engineering Background
The Bently Nevada 3300 XL NSv (Non-Standard voltage) Proximity Transducer System is a precision eddy-current sensing solution engineered for continuous, non-contact measurement of shaft radial vibration, axial position, and differential expansion in critical rotating machinery. Developed under Baker Hughes’ Bently Nevada machinery protection portfolio, this system is the field-proven successor to the legacy 3300 XL series, delivering enhanced signal fidelity and broader compatibility with modern condition monitoring platforms.
Product Positioning
Part number 330904-00-07-50-02-00 is a complete transducer system configured for 7.87 mm (5/16-18 UNF) probe tip, 5.0 m (16.4 ft) extension cable, and a standard Proximitor® sensor. It is the preferred choice for procurement engineers specifying OEM-equivalent replacements in turbines, compressors, pumps, and gearboxes where API 670 compliance is mandatory.
Complete Technical Specifications
- Part Number: 330904-00-07-50-02-00
- Series / Platform: Bently Nevada 3300 XL NSv
- Measurement Type: Eddy-current proximity (non-contact)
- Probe Tip Diameter: 7.87 mm (5/16-18 UNF thread)
- Extension Cable Length: 5.0 m (16.4 ft)
- System Output: –24 VDC nominal (NSv – Non-Standard voltage)
- Scale Factor: 7.87 V/mm (200 mV/mil)
- Linear Range: 0.25 mm – 2.26 mm (10 – 89 mil)
- Frequency Response: DC – 10,000 Hz (–3 dB)
- Operating Temperature: –35 °C to +177 °C (probe); –35 °C to +85 °C (Proximitor)
- Target Material: AISI 4140 steel (standard); other alloys with calibration
- Connector Type: MIL-C-5015 (probe); BNC (Proximitor output)
- Power Supply: –24 VDC ± 1 VDC @ 25 mA max
- Compliance: API 670 5th Edition, CE, RoHS
- Approvals: FM, CSA, ATEX, IECEx (intrinsically safe configurations)
- Weight: ~40 g (probe assembly)
Proven Application Environments
- Steam and gas turbines (power generation, petrochemical)
- Centrifugal and axial compressors (upstream oil & gas, LNG)
- High-speed gearboxes and expanders
- Boiler feed pumps and large motor-driven equipment
- Hydro turbines and wind turbine main shafts
- Retrofit and OEM-equivalent replacement on existing 3300 XL installations
Engineering Advantages
- API 670 Compliant: Drop-in replacement for machinery protection systems requiring 5th Edition compliance without re-calibration.
- NSv Output Compatibility: –24 VDC output integrates directly with Bently Nevada 3500 series monitors and third-party DCS/PLC inputs without signal conditioning.
- Extended Temperature Range: Probe rated to +177 °C for high-temperature bearing housings without performance degradation.
- Matched System Calibration: Probe, extension cable, and Proximitor® sensor are factory-matched and calibrated as a system, eliminating field calibration errors.
- Hazardous Area Rated: ATEX/IECEx certified for Zone 0/1 installations in explosive atmospheres.
System Architecture & Signal Flow
The 330904-00-07-50-02-00 operates as a three-component matched system:
- Probe (330900 series): Generates a high-frequency electromagnetic field (1.0 MHz nominal). Eddy currents induced in the rotating shaft attenuate the field proportionally to gap distance.
- Extension Cable (330130 series): 5.0 m coaxial cable maintains signal integrity between probe and Proximitor®. Impedance-matched to system specification.
- Proximitor® Sensor (330180 series): Demodulates the RF signal and outputs a DC-coupled voltage proportional to probe gap. Output feeds directly to monitor channel inputs (e.g., Bently Nevada 3500/40M, 3500/42M).
Signal path: Shaft gap → Probe → Extension Cable → Proximitor® → –24 VDC analog output → Monitor/DCS input
Sourcing & Quality Verification
- Units sourced from authorized distributors and verified OEM surplus channels.
- Each system undergoes incoming inspection: visual, dimensional, and functional verification against Bently Nevada factory test specifications.
- Serialization and date codes verified; no counterfeit or refurbished units.
- Certificate of Conformance (CoC) and test report available upon request.
- Long-term storage units maintained in climate-controlled, ESD-safe environment.
Procurement Process
- Submit RFQ via support@konmask.com or WhatsApp +0086 19859288691 with your required quantity and delivery timeline.
- Receive formal quotation with lead time, CoC availability, and shipping options within 24 hours.
- Confirm PO — we accept T/T, L/C, and major credit cards.
- Shipment via DHL / FedEx / UPS with full tracking; export documentation (commercial invoice, packing list, CO) included.
- Post-delivery technical support available for installation and commissioning queries.
Technical FAQ
Q: Is the 330904-00-07-50-02-00 a direct replacement for the 330900-00-07-50-02-00?
A: Yes. The 330904 series is the current production revision of the 330900 series with identical mechanical and electrical interfaces. No wiring or mounting changes are required.
Q: Can this system be used with non-Bently Nevada monitors?
A: Yes. The –24 VDC analog output is compatible with any monitor or DCS input accepting a standard proximity transducer signal, provided the power supply meets –24 VDC ± 1 VDC specification.
Q: What is the shelf life of an unused unit?
A: Bently Nevada specifies a 10-year shelf life for properly stored units. All stock at Konmask.com is within manufacturer shelf life and stored per IPC-1601 guidelines.
Q: Do you provide ATEX documentation for hazardous area installations?
A: Yes. ATEX/IECEx certificates and EC Declaration of Conformity are available upon request at no additional charge.
Q: What is the minimum order quantity?
A: MOQ is 1 unit. Volume pricing is available for orders of 5 units or more.
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Contact: support@konmask.com | +0086 19859288691
