BENTLY NEVADA 330980-51-05 – Non-Contacting Proximity Transducer | NSv Proximitor Series Platform
Engineering Background
The Bently Nevada NSv (Non-contacting vibration) Proximitor Sensor system is the industry benchmark for eddy-current proximity measurement in rotating machinery protection. Developed by Baker Hughes (Bently Nevada), the NSv platform supersedes the legacy 3300 XL series with enhanced EMI immunity, tighter linearity tolerances, and a fully integrated signal conditioning architecture. The 330980-51-05 is a field-proven transducer widely deployed in turbines, compressors, pumps, and gearboxes across oil & gas, power generation, and petrochemical industries.
Product Positioning
The 330980-51-05 is engineered for procurement engineers and reliability teams who require a drop-in compatible, OEM-specification proximity sensor for API 670-compliant machinery protection systems. Konmask.com supplies this unit as a verified, traceable component with full documentation support — eliminating the sourcing risk associated with grey-market alternatives.
Complete Technical Specifications
- Manufacturer: Bently Nevada (Baker Hughes)
- Part Number: 330980-51-05
- Series / Platform: NSv Proximitor Sensor System
- Measurement Principle: Eddy-current (non-contacting)
- Nominal Gap Range: 0.25 mm – 2.25 mm (10 – 90 mil)
- Scale Factor: 7.87 V/mm (200 mV/mil) nominal
- Linearity: ±1% of full-scale range
- Frequency Response: DC – 10,000 Hz (–3 dB)
- Supply Voltage: –24 VDC (–20 VDC to –26 VDC)
- Output Signal: –2 VDC to –18 VDC (proportional to gap)
- Probe Cable Length: 5 m (standard)
- Extension Cable: Compatible with NSv 330130 series
- Temperature Range (Probe Tip): –35°C to +121°C
- Temperature Range (Proximitor): –35°C to +85°C
- Ingress Protection: IP67 (Proximitor housing)
- Connector Type: MIL-C-5015 series (standard)
- Target Material: AISI 4140 steel (standard); other alloys with calibration
- Hazardous Area Approvals: ATEX, IECEx, FM, CSA (zone-dependent; verify datasheet)
- Weight: Approx. 500 g (complete assembly)
- Compliance Standard: API 670 4th Edition compatible
Proven Application Environments
- Steam and gas turbine radial/axial vibration monitoring
- Centrifugal and reciprocating compressor shaft displacement measurement
- Pump and motor bearing proximity sensing
- Gearbox and expander rotor dynamic analysis
- Bently Nevada 3500 / System 1 rack integration (direct replacement)
- Retrofit of legacy 3300 XL Proximitor installations
- Offshore platform and subsea topsides machinery protection systems
Engineering Advantages
- OEM-Identical Performance: Factory-calibrated scale factor and linearity — no field recalibration required on direct replacement.
- Enhanced EMI Immunity: NSv architecture provides superior noise rejection versus legacy 3300 XL in VFD-dense environments.
- Extended Temperature Envelope: Probe tip rated to +121°C, suitable for high-temperature bearing housings without derating.
- API 670 Compliance: Meets 4th Edition requirements for radial vibration, axial position, and differential expansion channels.
- Plug-and-Play Compatibility: Electrically and mechanically compatible with Bently Nevada 3500 series monitor racks and System 1 software.
- Traceable Documentation: Supplied with calibration certificate and material traceability on request.
System Architecture & Signal Flow
The NSv Proximitor system operates as a three-component eddy-current transducer chain:
- Probe (330980-51-05): Generates a high-frequency oscillating magnetic field via an internal coil. Eddy currents induced in the conductive target attenuate the field proportionally to gap distance.
- Extension Cable (330130 series): Transmits the raw oscillator signal from the probe to the Proximitor with controlled impedance. Cable length is calibrated as part of the system.
- Proximitor Module: Demodulates the oscillator signal, applies temperature compensation, and outputs a DC voltage proportional to gap (–2 V to –18 V). This signal feeds directly into the 3500 monitor rack’s I/O module.
The output is continuously monitored by the 3500 rack for alert and danger setpoint exceedances, with trip relay outputs driving machinery shutdown logic per API 670.
Sourcing & Quality Verification
- Source: Konmask.com procures Bently Nevada components through authorized distribution and verified surplus channels with full chain-of-custody documentation.
- Inspection: Each unit undergoes visual inspection, label verification, and functional continuity check prior to dispatch.
- Calibration Certificate: Available on request for units requiring documented traceability.
- Counterfeit Mitigation: All units are cross-referenced against OEM part number databases. Suspect units are quarantined and not listed.
- Warranty: 12-month operational warranty against manufacturing defects. Contact support for RMA procedures.
Procurement Process
- Confirm Compatibility: Verify your existing extension cable length and Proximitor model against the 330980-51-05 datasheet. Contact our technical team if uncertain.
- Request Quote / Stock Check: Email support@konmask.com or call +0086 19859288691 for lead time and volume pricing.
- Place Order: Add to cart and complete checkout. Purchase orders (PO) accepted for qualified B2B accounts.
- Shipping: Standard export packaging with ESD protection. DHL / FedEx international express available. HS Code provided for customs clearance.
- Documentation: Commercial invoice, packing list, and optional calibration certificate issued with each shipment.
Technical FAQ
Q: Is the 330980-51-05 a direct replacement for the 330900 series?
A: The NSv 330980 series is the recommended upgrade path from the 330900 (3300 XL) series. Electrical output and scale factor are compatible, but verify connector pinout and extension cable compatibility before installation.
Q: Can this sensor be used with non-Bently Nevada monitor racks?
A: Yes. The –2 V to –18 VDC output is a standard industry signal compatible with most third-party vibration monitors, provided the supply voltage (–24 VDC) is correctly sourced.
Q: What target materials are supported?
A: The standard calibration is for AISI 4140 steel. Other ferromagnetic and non-ferromagnetic alloys (e.g., Inconel, titanium) require a material-specific calibration curve. Contact us for calibrated assemblies.
Q: Is ATEX certification included?
A: ATEX/IECEx certification is model-variant dependent. The 330980-51-05 carries applicable hazardous area approvals — confirm the specific zone classification against your area classification drawing before installation.
Q: What is the lead time?
A: In-stock units ship within 1–3 business days. For out-of-stock items, typical lead time is 2–6 weeks depending on sourcing channel. Contact us for real-time availability.
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Contact: support@konmask.com | +0086 19859288691
