Bently Nevada 330101-23-34-10-02-05 – 8mm Eddy Current Proximity Probe | 3300 XL Series
Engineering Background
The Bently Nevada 3300 XL Series represents the industry benchmark for non-contact vibration and position measurement in rotating machinery. Developed by Baker Hughes (Bently Nevada), the 3300 XL system is deployed globally in critical turbomachinery applications including steam turbines, gas turbines, compressors, and pumps where continuous shaft monitoring is mandatory under API 670 standards.
Product Positioning
The 330101-23-34-10-02-05 is an 8mm diameter eddy current proximity probe engineered for high-resolution radial vibration and axial position measurement. It forms the sensing element of a three-component measurement chain (probe + extension cable + proximitor/driver) and is fully compatible with the Bently Nevada 3300 XL signal conditioning ecosystem. This probe is the preferred choice for procurement engineers specifying API 670-compliant machinery protection systems.
Complete Technical Specifications
| Part Number | 330101-23-34-10-02-05 |
| Series | Bently Nevada 3300 XL |
| Probe Diameter | 8 mm |
| Sensing Technology | Eddy Current (Non-contact) |
| Linear Range | 0.25 mm – 2.26 mm (10 mil – 90 mil) |
| Scale Factor | 7.87 V/mm (200 mV/mil) |
| Frequency Response | DC – 10,000 Hz (–3 dB) |
| Operating Temperature | –35°C to +177°C (–31°F to +351°F) |
| Cable Length (Probe) | 0.9 m (3 ft) integral armored cable |
| Extension Cable Compatibility | 3300 XL Extension Cable (3300 XL 05-01-10-00 series) |
| Proximitor Compatibility | 3300 XL 8mm Proximitor (330180 series) |
| Connector Type | Reverse SMA (RSMA) |
| Housing Material | Stainless Steel (316L) |
| Thread Size | M10 × 1.0 |
| Target Material | AISI 4140 Steel (standard); consult factory for non-ferrous targets |
| Supply Voltage | –24 VDC (via Proximitor) |
| Approvals | CE, ATEX, IECEx (consult datasheet for zone ratings) |
| Weight | Approx. 80 g |
| Country of Origin | United States |
Proven Application Environments
- Steam Turbines – Radial shaft vibration monitoring per API 670 / ISO 7919
- Gas Turbines & Compressors – Continuous rotor dynamic surveillance in power generation and petrochemical plants
- Centrifugal Pumps – Bearing journal orbit analysis and thrust position measurement
- Gearboxes – Gear mesh frequency and shaft eccentricity detection
- Hydro Turbines – Low-speed shaft runout and position trending
- Marine Propulsion Systems – Shaft alignment verification and vibration surveillance
Engineering Advantages
- Non-contact measurement – Zero mechanical wear; suitable for continuous 24/7 operation in critical machinery protection loops
- Wide temperature range – Qualified to –35°C to +177°C, covering most industrial process environments without derating
- High frequency response – DC to 10 kHz bandwidth captures sub-synchronous, synchronous, and super-synchronous vibration components
- API 670 compliant – Drop-in replacement for existing 3300 XL installations; no recalibration of the Proximitor required when replacing like-for-like
- Armored integral cable – Stainless steel armor protects against mechanical damage in harsh plant environments
- ATEX / IECEx rated – Suitable for use in hazardous area Zone 1 / Zone 2 classified locations (verify zone rating on product label)
System Architecture & Signal Flow
The 3300 XL measurement chain operates as follows:
- Probe (330101-23-34-10-02-05) – Generates a high-frequency electromagnetic field (oscillator frequency ~1 MHz) directed at the rotating shaft target
- Extension Cable – Transmits the RF signal between probe and Proximitor with controlled impedance; total system cable length must match Proximitor calibration (typically 5 m or 9 m system)
- Proximitor / Driver (330180 series) – Demodulates the RF signal and outputs a DC-coupled voltage proportional to gap distance at 200 mV/mil scale factor
- Monitor / Protection System – Receives the analog voltage output for display, alarming, and machinery trip functions (e.g., Bently Nevada 3500 Series rack)
Note: The probe, extension cable, and Proximitor must be ordered and calibrated as a matched system. Mixing components from different cable-length configurations will result in scale factor errors.
Sourcing & Quality Verification
- All units sourced through authorized industrial distribution channels or directly from Baker Hughes / Bently Nevada certified inventory
- Each probe is inspected for physical integrity, connector condition, and cable armor continuity prior to shipment
- Original manufacturer packaging and documentation preserved where available
- Traceability documentation (CoC, test reports) available upon request for critical applications
- Konmask.com specializes in obsolete, long lead-time, and MRO replacement parts for industrial automation and machinery protection systems
Procurement Process
- Verify compatibility – Confirm your existing Proximitor model and total system cable length before ordering
- Request a quote – Contact us at support@konmask.com for volume pricing, lead time, and availability confirmation
- Place order – Secure checkout via Konmask.com; payment by T/T, credit card, or PayPal accepted
- Shipping – DHL / FedEx international express; export documentation and commercial invoice provided
- After-sales support – Technical assistance available for installation verification and system commissioning queries
Technical FAQ
Q: Can I use this probe with a 3300 XL 5mm Proximitor?
A: No. The 330101 series is an 8mm probe and must be paired with an 8mm Proximitor (330180 series). Using a mismatched Proximitor will result in incorrect scale factor and potential false trips.
Q: What is the maximum shaft runout this probe can measure?
A: The linear range is 0.25 mm to 2.26 mm (10–90 mil). For API 670 radial vibration applications, the probe gap is typically set at the midpoint (~1.27 mm / 50 mil), providing ±1 mm of dynamic measurement range.
Q: Is this probe suitable for non-ferrous shaft targets (e.g., titanium, Inconel)?
A: The standard calibration is for AISI 4140 steel. Non-ferrous or exotic alloy targets require a target material correction factor or a custom calibration. Contact Bently Nevada or Konmask technical support for guidance.
Q: What is the difference between the 330101-23-34-10-02-05 and other 330101 variants?
A: The part number suffix encodes probe body length, cable length, connector type, and temperature rating. The -23-34-10-02-05 configuration specifies a 23 mm probe body, 0.9 m integral cable, RSMA connector, standard temperature rating, and CE/ATEX approval. Always verify the full part number when ordering replacements.
Q: Do you provide calibration certificates?
A: Factory calibration data is embedded in the Proximitor. Field recalibration of the probe itself is not required or recommended. CoC and inspection reports are available upon request.
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