Bently Nevada 330881-16-10-110-06-02 — Eddy-Current Proximity Transducer | 3300 XL Series Platform
Engineering Background
The Bently Nevada 330881 series represents the industry benchmark for non-contact shaft vibration and position measurement in rotating machinery. Engineered under Baker Hughes’ Bently Nevada division, these eddy-current proximity transducers are the preferred sensing element for turbines, compressors, pumps, and motors operating in critical process environments worldwide.
Product Positioning
Part number 330881-16-10-110-06-02 is a metric-configuration proximity transducer designed for integration into the 3300 XL monitoring system. It delivers continuous, real-time radial vibration and axial position data to protect high-value rotating assets from catastrophic failure. This unit is sourced from verified industrial channels and is fully compatible with Bently Nevada 3300 XL proximitor/seismic monitors.
Complete Technical Specifications
- Part Number: 330881-16-10-110-06-02
- Series / Platform: Bently Nevada 3300 XL
- Transducer Type: Eddy-Current Proximity Transducer
- Thread / Mechanical Standard: Metric
- Probe Tip Diameter: 8 mm (standard 3300 XL metric)
- Cable Length: 5 m (16 ft) — encoded in part number segment “-16”
- Extension Cable: 10 m — encoded in part number segment “-10”
- Nominal Gap Voltage: −10 VDC (at 1.0 mm nominal gap)
- Linear Range: 0.25 mm – 2.25 mm (10 – 90 mil)
- Scale Factor: 7.87 V/mm (200 mV/mil)
- Frequency Response: DC – 10,000 Hz (–3 dB)
- Supply Voltage: −24 VDC (nominal)
- Temperature Range (Operating): −35°C to +177°C (−31°F to +351°F)
- Connector Type: Integral coaxial, metric thread
- Approvals / Certifications: CE, ATEX, IECEx (consult datasheet for zone classification)
- Weight: Approx. 1,500 g (complete assembly with cable)
- Country of Origin: USA (Baker Hughes / Bently Nevada)
Proven Application Environments
- Steam and gas turbine radial vibration monitoring
- Centrifugal and axial compressor shaft displacement
- Boiler feed pump and cooling water pump protection
- Gearbox and motor bearing clearance measurement
- Petrochemical, LNG, and refinery rotating equipment
- Power generation (nuclear, thermal, combined-cycle)
- Offshore platform and FPSO machinery monitoring
Engineering Advantages
- Non-contact measurement — zero mechanical wear, unlimited service life on the sensing element
- High-frequency response (DC – 10 kHz) captures sub-synchronous, synchronous, and super-synchronous vibration events
- Metric thread configuration ensures direct drop-in replacement for existing metric-bored bearing housings without adapter hardware
- Fully compatible with Bently Nevada 3300 XL proximitor monitors, Rack Interface Modules (RIM), and System 1 software
- Robust construction rated for high-temperature, high-vibration, and chemically aggressive environments
- Plug-and-play integration — calibrated scale factor matches 3300 XL system defaults, minimizing commissioning time
System Architecture & Signal Flow
The 330881-16-10-110-06-02 operates as the sensing element in a three-component eddy-current system:
- Proximity Probe (330881) — generates a high-frequency electromagnetic field; gap change modulates the oscillator circuit
- Extension Cable (330130 / 330180 series) — transmits the modulated signal from the probe to the proximitor with minimal signal loss
- Proximitor / Monitor (3300 XL) — demodulates the signal, outputs a DC voltage proportional to gap distance, and feeds the rack monitor for alarm/trip logic
This architecture ensures galvanic isolation between the rotating shaft and the monitoring electronics, critical for personnel safety and signal integrity in high-voltage plant environments.
Sourcing & Quality Verification
- Units sourced from authorized industrial distributors and verified OEM surplus channels
- Each unit inspected for connector integrity, cable continuity, and probe tip condition prior to dispatch
- Original manufacturer documentation and calibration records available upon request
- Traceability to Baker Hughes / Bently Nevada manufacturing lot where available
- Konmask.com maintains a zero-counterfeit policy — all parts subject to incoming inspection against OEM specifications
Procurement Process
- Confirm part number 330881-16-10-110-06-02 matches your system’s cable length and thread specification
- Verify compatibity with your installed 3300 XL proximitor model (3300/16, 3300/20, 3300/55, etc.)
- Place order via Konmask.com product page or contact support@konmask.com for volume pricing and lead time
- Receive unit with inspection report; cross-check scale factor label against your monitor configuration
- Install per Bently Nevada Installation Manual 141536 (metric probe installation procedure)
Technical FAQ
Q: Is this unit interchangeable with the 330880 series?
A: The 330881 (metric) and 330880 (non-metric/inch) share identical electrical specifications but differ in thread pitch and probe body dimensions. Do not interchange without verifying housing bore thread standard.
Q: Can this probe be used with a non-Bently Nevada monitor?
A: The 330881 is optimized for the Bently Nevada 3300 XL proximitor. Use with third-party monitors requires verification of supply voltage (−24 VDC), scale factor compatibility (7.87 V/mm), and connector pinout.
Q: What is the recommended gap setting?
A: Nominal gap is 1.0 mm (40 mil), corresponding to −10 VDC output. Acceptable operating range is 0.25 – 2.25 mm. Set gap per API 670 and Bently Nevada commissioning guidelines.
Q: Is calibration required after installation?
A: The 330881 is factory-calibrated. Field calibration is not required if the probe, extension cable, and proximitor are used as a matched system. Verify output voltage at known gap before commissioning.
Q: What is the lead time for this part?
A: In-stock units ship within 1–3 business days. Contact us for current availability and expedited shipping options.
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