Rotating Machinery Vibration Monitoring Solution – Bently Nevada 330905-00-25-05-02-05 | NSv Series
In critical rotating machinery environments — from steam turbines in power plants to compressors in petrochemical facilities — continuous, accurate shaft vibration and position monitoring is non-negotiable. The Bently Nevada 330905-00-25-05-02-05 NSv Proximity Probe delivers the eddy-current sensing precision that plant engineers and reliability teams depend on to protect high-value assets and maintain uptime.
Where This Product Is Used
The 330905-00-25-05-02-05 is specified across a wide range of industrial applications where non-contact displacement measurement is required:
- Power Generation: Steam turbine shaft radial vibration monitoring, axial position measurement on gas turbines
- Oil & Gas / Petrochemical: Centrifugal compressor and pump shaft monitoring per API 670 requirements
- Pulp & Paper / Steel Mills: Large motor and gearbox bearing journal orbit analysis
- Marine Propulsion: Propeller shaft and reduction gear vibration surveillance
- General Industrial: Fan, blower, and rotating equipment health monitoring integrated with DCS/SCADA systems
Wherever a Bently Nevada 3500 or System 1 machinery protection rack is installed, the NSv probe series is the OEM-specified sensing element.
Technical Specifications
- Part Number: 330905-00-25-05-02-05
- Series: NSv (Non-contacting eddy-current proximity probe)
- Manufacturer: Bently Nevada (Baker Hughes)
- Probe Tip Diameter: 8 mm (standard NSv)
- Cable Length: 25 mm integral cable (field-replaceable extension cable compatible)
- Connector: 02 – Standard coaxial connector
- Armor / Jacket: 05 – Stainless steel armored cable
- Operating Temperature: –50°C to +177°C (probe body)
- Sensitivity: 7.87 V/mm (200 mV/mil) nominal
- Linear Range: 0.25 mm to 2.25 mm (10 mil to 90 mil)
- Supply Voltage: –24 VDC (via Proximitor® / driver)
- Output: –1 VDC to –18 VDC (gap-dependent)
- Target Material: AISI 4140 steel or equivalent ferromagnetic alloy
- Ingress Protection: IP67 (probe body)
- Approvals: CE, ATEX / IECEx (intrinsically safe configurations available)
- Weight: Approx. 220 g (probe + cable assembly)
- Compatible Drivers: Bently Nevada 3300 XL, 3500/42M, 990 Proximitor
Why Engineers Specify This Model
- API 670 Compliance: Fully meets the Machinery Protection Systems standard for radial vibration, axial position, and speed measurement — mandatory for critical turbomachinery in oil & gas.
- Non-Contact Measurement: Zero mechanical wear on the probe; continuous operation without maintenance intervals affecting measurement accuracy.
- High-Temperature Stability: Calibrated sensitivity remains within ±1% across the full operating temperature range — critical for hot-section turbine applications.
- Armored Cable Durability: Stainless steel armor (option -05) resists mechanical damage in congested machinery spaces and high-vibration environments.
- Direct OEM Replacement: Drop-in compatible with existing Bently Nevada 3300 and 3500 series installations — no recalibration of the monitoring rack required.
- Long-Term Availability: NSv series is the current-generation platform, ensuring spare parts availability and technical support continuity.
Complete System Bill of Materials
A complete Bently Nevada proximity measurement chain for one measurement point typically includes:
- Proximity Probe: 330905-00-25-05-02-05 (this item)
- Extension Cable: 330130-045-00-00 (1.5 m) or 330130-090-00-00 (3 m) — matched to total system cable length
- Proximitor® Driver: 3300 XL 8mm or 3500/42M Proximitor I/O Module
- Monitoring Rack: Bently Nevada 3500 Series (3500/22M, 3500/42M, 3500/45, etc.)
- Mounting Hardware: Probe holder, lock nut, and bracket per OEM drawing
- System Software: System 1 Evolution or Orbit 60 Series for data acquisition
Contact Konmask for bundle pricing on complete measurement chain assemblies.
Compliance & Industry Standards
- API 670 – Machinery Protection Systems (5th Edition)
- ISO 10816 / ISO 20816 – Mechanical vibration evaluation
- IEC 61511 – Functional Safety (SIL-rated configurations)
- ATEX Directive 2014/34/EU / IECEx – Hazardous area certification (verify specific approval code on nameplate)
- CE Marking – EU market compliance
- RoHS Compliant
Quality Assurance & Sourcing
Konmask sources the Bently Nevada 330905-00-25-05-02-05 exclusively through verified industrial distribution channels and authorized surplus networks. Every unit undergoes the following before dispatch:
- Visual inspection: connector integrity, cable armor continuity, probe tip condition
- Functional verification: DC resistance and sensitivity check against Bently Nevada factory specification
- Serialization check: part number and date code confirmed against OEM labeling standards
- Packaging: anti-static bag, foam-lined box, humidity indicator card
Certificate of conformance available upon request. Traceability documentation provided for regulated industries.
How to Source This Part
- In-Stock Orders: Add to cart and complete checkout — ships within 1–3 business days from our warehouse
- Urgent / Emergency Shutdown (ESD) Requirements: Contact us directly at support@konmask.com or call +0086 19859288691 for expedited processing
- Volume / Project Procurement: Request a formal quotation for quantities of 5+ units or complete system BOM packages
- Global Shipping: DHL Express, FedEx International Priority, and sea freight options available — export documentation (CO, packing list, commercial invoice) included
Application-Specific FAQ
Q: Is the 330905-00-25-05-02-05 compatible with the Bently Nevada 3500/42M module?
A: Yes. The NSv 8mm probe is fully compatible with the 3500/42M Proximitor I/O module when used with the correct extension cable to achieve the required total cable length (typically 5 m or 9 m system).
Q: Can this probe be used in a hazardous (Zone 1 / Division 1) area?
A: The NSv series has ATEX/IECEx certifications available. Verify the specific approval code on the probe nameplate and confirm the Proximitor driver carries the matching certification before installation in classified areas.
Q: What is the correct gap setting for this probe?
A: The recommended installation gap for the 8mm NSv probe is 1.0 mm (40 mil), placing the output at approximately –10 VDC at the midpoint of the linear range. Always verify with the site-specific calibration sheet.
Q: Can I replace just the probe without replacing the extension cable?
A: Yes, provided the existing extension cable is an NSv-compatible Bently Nevada cable and the total system cable length remains within specification. Inspect the extension cable connector for wear before reuse.
Q: Do you supply calibration certificates?
A: A certificate of conformance is included. Factory calibration certificates (original Bently Nevada) are available for new-in-box units where documentation has been preserved. Contact us to confirm availability for your specific serial number.
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Contact: support@konmask.com | +0086 19859288691
