Bently Nevada 330104-00-21-05-01-00 – Eddy-Current Proximity Transducer | 3300 XL Series Platform
Engineering Background: The Bently Nevada 3300 XL Series represents the industry benchmark for non-contacting eddy-current measurement in rotating machinery protection. Developed under Baker Hughes’ Bently Nevada product line, the 3300 XL system is engineered to API 670 standards and is the de-facto specification for turbomachinery OEM and aftermarket installations worldwide. The 330104-00-21-05-01-00 is a fully configured proximity transducer assembly within this platform, optimized for radial shaft vibration and axial position measurement in high-speed rotating equipment.
Product Positioning: This model is specified by rotating equipment engineers who require a drop-in replacement or new installation transducer that is fully compatible with existing Bently Nevada 3300 XL monitor racks. The part number encodes a specific cable length, thread configuration, and connector type, making it a precision-matched component — not a generic sensor. Procurement engineers at refineries, power plants, and petrochemical facilities rely on this exact SKU to maintain OEM-equivalent performance without re-engineering the monitoring loop.
Complete Technical Specifications
- Manufacturer: Bently Nevada (Baker Hughes)
- Part Number / SKU: 330104-00-21-05-01-00
- Series: 3300 XL Proximity Transducer System
- Measurement Principle: Eddy-current (non-contacting)
- Measurement Range: 0 – 90 mil pp (0 – 2.286 mm pp) radial vibration
- Sensitivity: 200 mV/mil (7.87 V/mm) nominal
- Frequency Response: DC – 10,000 Hz (–3 dB)
- Operating Temperature: –35°C to +177°C (transducer tip)
- Cable Length: 21 inches (integral cable, encoded in PN)
- Thread Size: 5/16-28 UNF (encoded in PN)
- Connector Type: Standard BNC / Bently Nevada proprietary (per PN suffix)
- Target Material: AISI 4140 steel (standard); consult factory for non-standard alloys
- Supply Voltage: –24 VDC (nominal, from proximitor/driver)
- Output Signal: –2 VDC to –18 VDC (linear range)
- Ingress Protection: IP67 (transducer body)
- Compliance: API 670 5th Edition, CE, ATEX (zone-dependent, verify per installation)
- Weight: ~80 g (transducer assembly)
Proven Application Environments
- Steam Turbines: Radial shaft vibration monitoring on HP/LP turbine rotors in power generation plants (50 Hz / 60 Hz grid-tied units)
- Gas Turbines: Continuous vibration surveillance on industrial gas turbines (GE Frame, Siemens SGT, Solar Turbines) in oil & gas compression stations
- Centrifugal Compressors: Shaft displacement monitoring in ethylene, ammonia, and LNG refrigeration compressor trains
- Pumps & Fans: Axial position and radial vibration on boiler feed pumps and induced-draft fans in thermal power stations
- Gearboxes: High-speed pinion shaft monitoring in integrally geared compressors
- Expanders / Turboexpanders: Cryogenic service monitoring in air separation units and LNG plants
Engineering Advantages
- API 670 Compliant: Meets the 5th Edition standard for machinery protection systems — accepted by EPC contractors and plant operators globally
- Non-contacting Measurement: Zero mechanical wear; continuous operation without scheduled sensor replacement
- Wide Frequency Bandwidth: DC to 10 kHz captures both low-speed runout and high-frequency sub-synchronous instability events
- OEM Rack Compatibility: Direct plug-in replacement for existing 3300 XL monitor racks (3300/16, 3300/20, 3300/25 series) — no recalibration required
- Integral Cable Design: Factory-terminated cable eliminates field-splice failure points; cable length encoded in PN for exact replacement
- Hazardous Area Rated: ATEX/IECEx certified variants available for Zone 1/Zone 2 installations in refineries and offshore platforms
System Architecture & Signal Flow
The 330104-00-21-05-01-00 operates as the sensing element in a three-component Bently Nevada proximity system:
- Transducer (330104-00-21-05-01-00): Generates a high-frequency electromagnetic field at the probe tip. Eddy currents induced in the rotating shaft attenuate the field proportionally to gap distance.
- Extension Cable (330130 series): Transmits the demodulated signal from the transducer to the proximitor driver. Total system cable length (transducer + extension) must match the proximitor calibration.
- Proximitor / Driver (330180 series): Demodulates the oscillator signal and outputs a DC voltage proportional to gap (–2 V to –18 V). Feeds directly into the 3300 XL monitor rack input card.
Note: All three components must be from the same calibrated system set. Mixing series (e.g., 3300 XL transducer with 3500 proximitor) will result in calibration errors and is not supported.
Sourcing & Quality Verification
- All units sourced through authorized industrial distribution channels or directly from Baker Hughes / Bently Nevada certified partners
- Each unit ships with original manufacturer documentation and traceable lot/serial data where available
- Pre-shipment inspection includes visual, dimensional, and continuity checks against OEM specifications
- Konmask.com maintains a documented supplier qualification process; counterfeit-risk mitigation is applied to all Bently Nevada SKUs
- Certificate of Conformance (CoC) available upon request for plant QA/QC records
Procurement Process
- Confirm Part Number: Verify the full 18-digit PN (330104-00-21-05-01-00) against your existing installation drawings or Bently Nevada system documentation
- Check System Compatibility: Confirm proximitor model and total cable length match the calibrated system set
- Request Quote: Contact support@konmask.com with your PO requirements, delivery timeline, and any CoC/documentation needs
- Lead Time: In-stock units ship within 1–3 business days; ex-stock availability confirmed at time of inquiry
- Export Compliance: Bently Nevada products may be subject to export control regulations; Konmask.com handles EAR/ECCN classification and documentation for international shipments
Technical FAQ
Q: Can I use the 330104-00-21-05-01-00 with a 3500 series monitor rack?
A: No. The 3300 XL and 3500 series use different proximitor calibrations and connector standards. Cross-series mixing will produce measurement errors. Use 330104 series only with 3300 XL proximitors and monitor racks.
Q: What is the maximum shaft speed this transducer can monitor?
A: The 10 kHz frequency response supports shaft speeds up to approximately 600,000 RPM for 1× vibration detection, well beyond the range of any industrial turbomachinery application.
Q: Does the cable length affect calibration?
A: Yes. The total system cable length (transducer integral cable + extension cable) must match the proximitor’s calibrated length. The “21” in the PN denotes the integral cable length. Always verify total system cable length against the proximitor calibration certificate.
Q: Is this transducer suitable for cryogenic or high-temperature service?
A: The standard 330104 transducer is rated to +177°C at the tip. For cryogenic or above-177°C applications, consult Bently Nevada for high-temperature or cryogenic-rated variants.
Q: Can Konmask.com provide a calibration certificate?
A: We provide OEM documentation and CoC. For NIST-traceable calibration certificates, please specify this requirement at time of order; third-party calibration can be arranged.
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