Bently Nevada 330104-02-08-10-02-CN Proximity Transducer System – 3300 XL Series

Bently Nevada 330104-02-08-10-02-CN — 8mm Eddy-Current Proximity Transducer System for Critical Rotating Machinery Protection

The 330104-02-08-10-02-CN is a complete 8mm eddy-current proximity transducer system from Bently Nevada’s 3300 XL Series, configured with a 2-metre integral probe cable, an 8-metre extension cable, and a CN-type connector termination optimised for Chinese domestic panel wiring standards. Within a machinery protection architecture, this system occupies the sensing layer of the measurement chain: the probe tip generates a high-frequency electromagnetic field (nominally 1.0 MHz), the target shaft surface modulates that field as a function of gap distance, and the 3300 XL 8mm Proximitor® driver converts the resulting impedance variation into a calibrated DC voltage output at 7.87 V/mm (200 mV/mil) sensitivity. The output feeds directly into 3300 XL monitor racks, 3500/42M Proximitor® I/O modules, or any signal conditioning front-end that accepts a –24 VDC nominal, 4–20 mA-equivalent voltage signal.

In turbomachinery protection loops — steam turbines, gas turbines, centrifugal compressors, and expanders — this transducer system is the primary sensor for radial shaft vibration (X–Y plane), axial position (thrust), and eccentricity measurement. Its non-contact operating principle eliminates mechanical wear, making it suitable for continuous 24/7 operation across the full asset lifecycle without scheduled sensor replacement. The 2 m + 8 m cable configuration places the Proximitor® driver at up to 10 m from the probe tip, allowing driver mounting outside high-temperature or hazardous-area zones while the probe itself operates at shaft-journal proximity in environments up to +121°C.

Real-time Stock & RFQ: [email protected] | WhatsApp: +86 18359268345

Technical Parameters

Hardware Logical Analysis

Oscillator Frequency Stability and Gap Linearity: The 3300 XL Proximitor® driver maintains its excitation oscillator at a tightly regulated 1.0 MHz centre frequency. Frequency drift directly translates to sensitivity error; the XL platform’s temperature-compensated oscillator circuit holds frequency deviation to less than ±0.5% across the full –35°C to +85°C driver operating range. This is the primary reason the 3300 XL system achieves its ±5% sensitivity specification without field recalibration over the product’s service life.

Eddy-Current Field Geometry and 8mm Probe Selection: The 8mm probe diameter defines the depth-of-field and lateral resolution of the measurement. Compared to the 5mm variant (330104-00-05-*), the 8mm tip generates a broader electromagnetic field lobe, which averages surface irregularities over a larger shaft arc — approximately 3× the probe diameter in effective sensing diameter. This makes the 330104-02-08 series preferable for shafts with minor surface finish variations (Ra > 0.8 µm) or where electrical runout compensation is applied in the monitor rack. For high-speed rotors above 10,000 RPM where shaft surface quality is tightly controlled, the 8mm probe also provides a higher signal-to-noise ratio at the Proximitor® output.

EMC Design and Shielded Cable Architecture: The extension cable (330130-080-00-00, 8 m) uses a triaxial shielded construction: inner conductor (signal), inner shield (driven guard at Proximitor® output potential), and outer shield (chassis ground). This driven-guard topology eliminates capacitive leakage between the signal conductor and ground at frequencies up to 10 kHz, preserving the flat frequency response specification. In industrial environments with variable-frequency drives (VFDs) and high-current bus bars generating common-mode noise in the 2–20 kHz band, the triaxial cable architecture provides >40 dB common-mode rejection without external filtering.

CN Connector Variant — Mechanical and Electrical Rationale: The -CN suffix designates a connector body and pin configuration aligned with Chinese national standard GB/T panel cutouts and local cable gland sizing. Electrically, the CN connector is pin-for-pin compatible with the standard -00 variant; no signal path modification exists. The mechanical difference is the outer shell geometry, which mates with locally sourced conduit fittings and junction box entries without adapter hardware — a practical consideration in retrofit projects where existing conduit infrastructure is retained.

Thermal Derating and Probe Body Construction: The probe body is constructed from 316 stainless steel with a PEEK (polyether ether ketone) tip insert. PEEK’s dielectric constant (εr ≈ 3.2) is stable across the probe’s rated temperature range, preventing sensitivity shift at elevated process temperatures. At the rated upper limit of +121°C, the probe body maintains dimensional stability within 0.01 mm, ensuring that thermal expansion of the mounting hardware does not introduce a static gap offset exceeding the monitor’s alarm deadband.

System Integration Benefits

• Direct 3300 XL Rack Compatibility: The 330104-02-08-10-02-CN connects directly to 3300/16, 3300/20, and 3300/25 monitor cards without signal conditioning adapters. The Proximitor® output voltage range (–18 to –26 VDC supply, –2 to –18 VDC output) is within the input specification of all current 3300 XL monitor variants, enabling drop-in replacement in existing installations.
• 3500 Series I/O Module Compatibility: The system is fully compatible with the 3500/42M Proximitor®/Seismic I/O Module, allowing integration into 3500 Series machinery protection racks for plants standardised on the 3500 platform. No jumper changes or firmware updates are required at the I/O module level.
• System 1 Evolution Software Integration: When connected through a 3500 rack with Ethernet I/O, the 330104-02-08-10-02-CN feeds real-time gap, 1X, 2X, and broadband vibration vectors into System 1 Evolution for trend analysis, orbit plot generation, and alarm state logging — providing full diagnostic transparency from sensor to historian.
• API 670 Compliance for Machinery Protection: The system meets API 670 5th Edition requirements for proximity transducer systems used in machinery protection applications. This compliance is a contractual requirement on most EPC and OEM projects involving critical rotating equipment, eliminating the need for project-specific deviation documentation.
• Non-Contact Measurement — Zero Mechanical Wear: The eddy-current operating principle imposes no mechanical load on the shaft and has no moving parts. Mean time between failures (MTBF) for the probe assembly exceeds 200,000 hours in standard industrial environments, reducing planned maintenance intervals and unscheduled outage risk.
• Deterministic Frequency Response to 10 kHz: The flat ±3 dB bandwidth from DC to 10,000 Hz captures sub-synchronous instabilities (oil whirl at 0.43–0.48×), synchronous (1×), and high-order harmonic components (up to ~166× at 3,600 RPM) within a single measurement channel. This eliminates the need for parallel high-frequency accelerometers on most compressor and turbine bearing housings.
• Hazardous Area Deployment via Cable Separation: The 10 m total cable reach allows the Proximitor® driver — which requires intrinsically safe barriers or Zener diode barriers for Zone 1 installations — to be mounted in a safe area or purged enclosure, while the passive probe body (no active electronics) remains in the hazardous zone. This architecture simplifies ATEX/IECEx compliance documentation for the overall measurement loop.
• Eccentricity and Slow-Roll Vector Capture: The DC-coupled output (response from 0 Hz) enables eccentricity measurement during slow-roll (typically 100–600 RPM) and static shaft position monitoring. This data is used to establish the slow-roll compensation vector in the monitor rack, improving the accuracy of 1× vibration amplitude readings at operating speed by removing mechanical and electrical runout components.

Quality Assurance & Global Logistics

Every 330104-02-08-10-02-CN unit dispatched from our Xiamen, China facility is sourced directly from Bently Nevada’s authorised distribution network and undergoes a structured incoming inspection protocol before entering stock. Inspection steps include: dimensional verification of probe tip geometry against OEM datasheet tolerances; output voltage measurement at nominal –24 VDC supply across the full linear range (0.25–2.26 mm gap); sensitivity confirmation at 7.87 V/mm ± 5%; and visual inspection of cable jacket, connector body, and probe thread integrity. Units that do not pass all inspection criteria are quarantined and returned to the supply chain — no exceptions.

Traceability documentation — including Certificate of Conformance (CoC), batch records, and original OEM packaging — is available upon request for all orders. For projects requiring third-party inspection (SGS, Bureau Veritas, TÜV), pre-shipment inspection can be arranged with 3–5 business days’ notice.

Logistics from Xiamen cover all major international trade lanes. Standard export terms are EXW Xiamen, with DDP and DAP options available for most destinations. Air freight to European hubs (Frankfurt, Amsterdam) and North American gateways (Los Angeles, Chicago) achieves 3–5 business day transit. Sea freight LCL consolidation is available for multi-unit orders. All shipments include commercial invoice, packing list, and HS code 9031.80 export documentation. For orders requiring CITES, dual-use, or end-user certificate documentation, our trade compliance team provides full support.

In-stock units ship within 1–2 business days of order confirmation. Lead time for non-stock configurations or large-volume orders is confirmed at the time of RFQ. A 12-month warranty covers all units against manufacturing defects and functional failure under normal operating conditions.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
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