Bently Nevada 330904-00-02-50-02-00 3300 XL NSv Proximity Transducer System | Replacement, Equivalent & Selection Guide
The Bently Nevada 330904-00-02-50-02-00 is a high-precision eddy-current proximity transducer belonging to the 3300 XL NSv (Non-Standard voltage) Series. Designed for continuous shaft vibration, position, and eccentricity measurement in rotating machinery, it is widely deployed in turbines, compressors, pumps, and other critical industrial assets. This page provides full technical specifications, compatible replacement options, a structured selection guide, and sourcing information to help engineers and procurement teams make confident decisions.
Technical Specifications
- Part Number: 330904-00-02-50-02-00
- Series: Bently Nevada 3300 XL NSv Proximity Transducer System
- Measurement Type: Eddy-current (non-contact) displacement / vibration
- Probe Tip Diameter: 8 mm (standard)
- Cable Length: 5.0 m (extension cable included in system)
- Linear Range: 2.0 mm (80 mil)
- Scale Factor: 7.87 V/mm (200 mV/mil) nominal
- Frequency Response: DC to 10,000 Hz (–3 dB)
- Operating Temperature: –35 °C to +177 °C (probe); –35 °C to +85 °C (driver)
- Supply Voltage: –24 VDC (NSv variant)
- Output Voltage Range: –2 VDC to –18 VDC
- Connector Type: Integral armored cable with MIL-spec connector
- Approvals: CE, ATEX, IECEx (consult datasheet for zone ratings)
- Target Material: AISI 4140 steel (or equivalent ferromagnetic alloy)
Compatible Replacement & Equivalent Models
The table below lists functionally equivalent or drop-in replacement options for the 330904-00-02-50-02-00. Always verify mechanical dimensions, scale factor, and supply voltage before substitution.
- Bently Nevada 330903-00-02-50-02-00 — Standard voltage (–24 V) variant; same probe geometry, different driver output range. Suitable when system accepts standard scale factor.
- Bently Nevada 330905-00-02-50-02-00 — Extended temperature probe; identical electrical specs, rated to +204 °C for high-heat environments.
- Bently Nevada 330780-50-00 — 3300 XL 8 mm standard proximity transducer; compatible with same 3300 series monitors when NSv output is not required.
- Epro PR6423/010-040 — Third-party eddy-current transducer; 8 mm tip, –24 V supply, 7.87 V/mm scale factor. Widely accepted as a functional equivalent in non-OEM maintenance scenarios.
- Metrix ST5484E — Proximity transducer with configurable scale factor; suitable for retrofit when exact Bently Nevada part is unavailable.
Note: Replacement parts must be validated against the connected monitor (e.g., 3300/16, 3500/42) for full system certification. Contact Konmask for compatibility verification.
Why Choose the Original Model
- OEM Certification: Factory-calibrated to Bently Nevada 3300 XL monitor specifications; no field recalibration required.
- NSv Output Compliance: The Non-Standard voltage output is specifically required by certain 3300 series monitor cards — substituting a standard-voltage probe will cause measurement errors.
- Long-Term Reliability: Armored cable construction and hermetically sealed probe tip ensure performance in harsh plant environments (oil mist, high humidity, vibration).
- Traceability: Each unit ships with a calibration certificate traceable to NIST standards, supporting ISO 17025 audit requirements.
- Warranty & Support: Backed by Baker Hughes / Bently Nevada global service network.
Typical Applications
- Steam and gas turbine shaft radial vibration monitoring
- Centrifugal compressor rotor position measurement
- Pump and motor eccentricity detection
- Gearbox and expander axial position monitoring
- API 670 compliant machinery protection systems
- Condition monitoring and predictive maintenance programs
System Compatibility
The 330904-00-02-50-02-00 is designed to operate within the Bently Nevada 3300 XL monitoring system. Confirmed compatible monitors and accessories include:
- Bently Nevada 3300/16 Dual Vibration Monitor
- Bently Nevada 3300/20 Radial Vibration Monitor
- Bently Nevada 3500/42 Proximitor I/O Module (NSv input card required)
- Bently Nevada 3300 XL Extension Cable (330130 series, matched length)
- Bently Nevada 3300 XL Proximitor Driver (330180 series)
Always confirm monitor card part number and input voltage range before ordering. Mixing NSv and standard-voltage components within the same channel will result in out-of-range readings.
Selection Guide
Use the following decision criteria to select the correct 3300 XL NSv proximity transducer for your application:
- Step 1 — Confirm monitor input type: Verify whether your 3300 or 3500 series monitor card requires NSv (Non-Standard voltage) input. Check the monitor card label or datasheet.
- Step 2 — Determine probe tip size: 8 mm tip (330904 series) is standard for most rotating machinery. 5 mm tips (330900 series) are used in space-constrained installations.
- Step 3 — Measure cable run length: Total system cable length (probe + extension) must match the Proximitor driver calibration. The -50- segment in the part number denotes 5.0 m extension cable.
- Step 4 — Assess temperature rating: Standard probe rated to +177 °C. For exhaust or high-heat zones exceeding this, select the extended-temperature variant (330905 series).
- Step 5 — Verify target material: Calibrated for AISI 4140 steel. Non-standard target materials (stainless, titanium) require a material correction factor — contact Konmask for recalibration options.
- Step 6 — Check approvals: For hazardous area installations, confirm ATEX/IECEx zone classification matches the probe approval rating on the product label.
Quality Assurance & Sourcing
Konmask.com sources the Bently Nevada 330904-00-02-50-02-00 through authorized distribution channels and verified surplus inventory networks. Every unit undergoes the following before shipment:
- Visual and dimensional inspection against OEM drawings
- Electrical continuity and insulation resistance test
- Scale factor verification using calibrated test rig
- Packaging inspection — original or equivalent ESD-safe packaging
- Documentation check — calibration certificate, datasheet, and traceability records included where available
We do not sell counterfeit, refurbished-as-new, or unverified grey-market parts. All inventory is clearly labeled with condition (New / Surplus New / Tested Used) at time of quotation.
How to Order
- Online: Add to cart directly from this page. For quantity pricing (>3 units), request a quote via the product page form.
- Email: Send your PO or RFQ to support@konmask.com with part number, quantity, and required delivery date.
- Phone / WhatsApp: +0086 19859288691 (Monday–Friday, 09:00–18:00 CST)
- Lead Time: In-stock units ship within 1–3 business days. Out-of-stock items are sourced within 5–15 business days depending on availability.
- Export: We ship worldwide. Export documentation (commercial invoice, packing list, COO) provided for all international orders.
Replacement & Compatibility FAQ
Q: Can I use a standard-voltage 330903 probe in place of the NSv 330904?
A: Not directly. The NSv variant outputs a different voltage range. Using a standard probe on an NSv monitor card will produce out-of-range readings and may trigger false alarms or missed trips. Always match the probe to the monitor card specification.
Q: Is the Epro PR6423 a certified drop-in replacement?
A: Epro PR6423 is electrically compatible in many installations, but it is not OEM-certified for Bently Nevada monitors. It may be acceptable for non-API 670 applications or as a temporary replacement. Consult your machinery protection engineer before substitution.
Q: What happens if the extension cable length does not match the calibration?
A: The Proximitor driver is calibrated for a specific total cable length. Mismatched cable length shifts the scale factor and zero-point, causing measurement inaccuracy. Always use the cable length specified in the part number (-50- = 5.0 m).
Q: Do you offer calibration services for used units?
A: Yes. Konmask partners with accredited calibration laboratories for 3300 XL series transducer recalibration. Contact us for pricing and turnaround time.
Q: Can this transducer be used with a 3500 series monitor?
A: Yes, with the correct 3500/42 Proximitor I/O module configured for NSv input. Confirm the I/O module part number includes NSv compatibility before installation.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
