Bently Nevada 330101-00-20-90-02-05 – 8mm Eddy Current Proximity Probe | 3300 XL Series Platform
Engineering Background
The Bently Nevada 3300 XL proximity probe system is the global benchmark for continuous, non-contact shaft vibration and position measurement in rotating machinery. Developed by Baker Hughes (Bently Nevada), the 3300 XL platform has been deployed across power generation, petrochemical, oil & gas, and heavy industrial facilities for decades. The eddy current sensing principle delivers sub-micron resolution without mechanical contact, making it the preferred technology for API 670-compliant machinery protection systems.
Product Positioning
The 330101-00-20-90-02-05 is an 8mm diameter eddy current proximity probe designed for use within the Bently Nevada 3300 XL monitoring architecture. It is engineered for OEM-grade accuracy in shaft radial vibration, axial position (thrust), and differential expansion measurement on steam turbines, gas turbines, compressors, pumps, and gearboxes. This probe is a direct, specification-matched replacement for installed 3300 XL systems worldwide.
Complete Technical Specifications
- Part Number: 330101-00-20-90-02-05
- Manufacturer: Bently Nevada (Baker Hughes)
- Series / Platform: 3300 XL
- Sensing Technology: Eddy Current (Non-contact)
- Probe Tip Diameter: 8 mm
- Cable Length: 5 m (integral cable, per part number suffix)
- Nominal Sensitivity: 7.87 V/mm (200 mV/mil)
- Linear Range: 0.25 – 2.25 mm (10 – 90 mil)
- Frequency Response: DC – 10,000 Hz (–3 dB)
- Operating Temperature: –35°C to +177°C (–31°F to +351°F)
- Supply Voltage: –24 VDC (nominal, via Proximitor® driver)
- Output Voltage: –1 VDC to –21 VDC (linear range)
- Target Material: AISI 4140 steel (standard); consult factory for non-ferrous targets
- Connector: Integral coaxial cable with standard BNC / TNC termination
- Housing Material: Stainless steel body, PTFE-jacketed cable
- Ingress Protection: IP67 (probe body)
- Compliance: API 670 (4th & 5th Edition), CE, ATEX / IECEx (zone-dependent)
- Weight: Approx. 300 g (probe + cable assembly)
Proven Application Environments
- Steam turbine radial shaft vibration (X–Y plane, API 670)
- Gas turbine axial thrust position monitoring
- Centrifugal compressor shaft displacement
- Boiler feed pump and cooling water pump vibration surveillance
- Gearbox pinion shaft orbit analysis
- Differential expansion measurement on large rotating machines
- Motor shaft eccentricity and runout detection
- Petrochemical plant continuous machinery protection systems
Engineering Advantages
- Non-contact measurement: Zero mechanical wear; suitable for continuous 24/7 operation in critical machinery protection loops.
- Wide frequency bandwidth (DC–10 kHz): Captures both slow-roll runout and high-frequency sub-synchronous instabilities in a single channel.
- High temperature tolerance (–35°C to +177°C): Qualified for hot-section installations adjacent to turbine casings and exhaust ducts.
- Direct 3300 XL system compatibility: Plug-and-play replacement; no recalibration of Proximitor® driver required when replacing like-for-like.
- API 670 compliance: Meets the machinery protection standard mandated by EPC contractors and plant operators globally.
- Integral cable construction: Eliminates field-assembled connector joints, reducing signal noise and improving MTBF in high-vibration environments.
System Architecture & Signal Flow
The 330101-00-20-90-02-05 probe operates as the sensing element in a three-component eddy current measurement chain:
- Proximity Probe (this unit): Generates a high-frequency electromagnetic field (typically 1 MHz) directed at the rotating shaft target.
- Extension Cable (3300 XL series, sold separately): Transmits the modulated RF signal from the probe to the Proximitor® driver with controlled impedance.
- Proximitor® Driver / Signal Conditioner (3300 XL series): Demodulates the RF signal and outputs a calibrated DC voltage proportional to the gap distance, feeding the 3500 Series rack or DCS/PLC input card.
The output signal (–1 VDC to –21 VDC) is directly compatible with Bently Nevada 3500 Series monitor cards, GE Mark VI/VIe turbine control systems, Emerson DeltaV, Honeywell Experion, and any 4–20 mA transmitter with voltage input conversion.
Sourcing & Quality Verification
- Origin: Genuine Bently Nevada (Baker Hughes) manufactured component; sourced through authorized industrial distribution channels.
- Condition: New / Surplus-new stock available; all units inspected prior to shipment.
- Traceability: Original manufacturer labeling and part number markings intact.
- Calibration: Factory-calibrated; certificate of conformance available upon request.
- Packaging: Anti-static, moisture-barrier packaging with foam-lined shipping carton.
Procurement Process
- Confirm compatibility: Verify your installed Proximitor® driver model and extension cable length match the 3300 XL system requirements for this probe.
- Request a quote: Contact support@konmask.com or call +0086 19859288691 for volume pricing, lead time, and export documentation.
- Place order: Add to cart and complete checkout; HKD pricing shown. Wire transfer (T/T) and PayPal accepted for international orders.
- Shipping: DHL / FedEx Express worldwide; typical transit 3–7 business days. Export declaration and commercial invoice provided.
- After-sales support: Technical application support available from our engineering team post-delivery.
Technical FAQ
Q: Is the 330101-00-20-90-02-05 compatible with the Bently Nevada 3500 monitoring rack?
A: Yes. When paired with the correct 3300 XL Proximitor® driver and extension cable, the output signal is fully compatible with 3500 Series monitor input cards.
Q: Can this probe be used with non-Bently Nevada signal conditioners?
A: The probe is optimized for use with Bently Nevada 3300 XL Proximitor® drivers. Use with third-party conditioners requires sensitivity and gap voltage verification; contact our engineering team for guidance.
Q: What is the recommended installation gap for this probe?
A: The nominal installation gap is 1.0 mm (40 mil), placing the operating point at the center of the linear range (0.25–2.25 mm). Refer to Bently Nevada installation drawing for thread engagement and locknut torque specifications.
Q: Is ATEX certification available for this part number?
A: ATEX / IECEx certification applicability depends on the complete probe-cable-driver assembly configuration. Please provide your hazardous area classification (Zone, Gas Group, Temperature Class) when inquiring.
Q: What is the lead time for this part?
A: In-stock units ship within 1–2 business days. For large quantities or specific certification requirements, contact us for confirmed lead time.
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