Bently Nevada 330104-00-08-10-02-CN Proximity Transducer System – 3300 XL

Bently Nevada 330104-00-08-10-02-CN — 3300 XL 8mm Eddy-Current Proximity Transducer System for Critical Rotating Machinery Protection

The Bently Nevada 330104-00-08-10-02-CN is a matched-system eddy-current proximity transducer assembly from the 3300 XL Series, engineered for continuous, non-contact measurement of shaft radial vibration, axial position, and eccentricity on turbines, compressors, and pumps operating in safety-critical process environments. The part number encodes a complete system configuration: 8 mm probe tip diameter, 8 ft (2.44 m) probe cable, 10 ft (3.05 m) armored extension cable, standard output polarity, and CN-suffix regional certification for China-market ATEX/IECEx hazardous-area compliance.

Unlike discrete sensors that require field-matched drivers, the 330104-00-08-10-02-CN ships as a factory-calibrated triad — probe, extension cable, and 3300 XL 8mm Proximitor® driver — with a guaranteed scale factor of 200 mV/mil (7.87 V/mm) traceable to the factory calibration record. This matched-system approach eliminates the inter-component gain error that accumulates when probe and driver are sourced separately, a critical requirement under API 670 (5th Edition) for machinery protection systems in oil & gas and power generation.

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Technical Parameters

Hardware Logical Analysis

The 330104-00-08-10-02-CN operates on the principle of high-frequency eddy-current induction. The Proximitor® driver generates an oscillating magnetic field at the probe tip coil, typically in the range of 1.0–1.5 MHz. When a conductive target (shaft) enters the field, eddy currents are induced on the target surface, loading the oscillator circuit and reducing its amplitude. The Proximitor® demodulates this amplitude change into a DC-proportional voltage output, yielding a linear displacement signal from –1 VDC (near gap) to –17 VDC (far gap).

EMC Design Architecture: The armored extension cable (segment “-02”) uses a tri-axial shielding geometry — inner conductor, inner shield, dielectric, outer shield — that provides >60 dB common-mode rejection against industrial electromagnetic interference sources including variable-frequency drives (VFDs), high-voltage bus bars, and RF transmitters. The shield is grounded at the Proximitor® end only (single-point grounding), preventing ground-loop currents that would appear as low-frequency noise on the displacement signal.

Thermal Drift Compensation: The 3300 XL probe coil is wound with a temperature-compensated alloy that maintains scale factor stability within ±0.5% across the full operating temperature range of –35°C to +121°C. This is achieved through a matched thermal coefficient between the coil winding material and the ferrite core, ensuring that thermal expansion of both elements tracks proportionally and cancels net inductance drift.

Matched-System Calibration Logic: Each 330104-00-08-10-02-CN system is calibrated as an integrated unit. The probe, extension cable, and Proximitor® are characterized together on a calibration bench using a precision micrometer stage and AISI 4140 steel target. The resulting calibration curve is stored in the factory record and referenced by the serial number. Substituting any single component without recalibration introduces a systematic scale factor error that cannot be corrected by software offset alone.

Connector and Cable Integrity: The probe-to-extension cable connector uses a bayonet-lock mechanism with gold-plated contacts rated for >500 mating cycles. The armored extension cable jacket is constructed from 316 stainless steel interlocked armor over a PTFE-insulated conductor, providing mechanical protection against abrasion, crush loads up to 500 N/cm, and chemical resistance to hydrocarbon process fluids and H₂S environments common in refinery installations.

System Integration Benefits

• Direct API 670 Compliance: The matched-system architecture satisfies API 670 (5th Edition) Section 5.3 requirements for proximity transducer systems without additional field calibration documentation, reducing commissioning time on new machinery protection installations.
• Deterministic Signal Latency: The DC-to-10,000 Hz frequency response with no internal digital processing ensures zero algorithmic latency in the measurement chain. The analog output reaches the 3500 rack I/O module within the propagation delay of the cable — typically <1 µs for 18 ft total reach — preserving the time-domain integrity of vibration waveforms used for rotor dynamic analysis.
• Plug-and-Play with 3500 Series Racks: The –24 VDC supply and –1 to –17 VDC output are natively compatible with all 3500 Series monitor cards. No signal conditioning, impedance matching, or configuration change is required when replacing an existing 330104-series probe in a live rack.
• System 1® Software Integration: The scale factor and gap voltage parameters are pre-loaded in System 1® Evolution’s device library under the 330104 model entry. Engineers can import the calibration data directly from the factory record using the serial number, eliminating manual parameter entry and associated transcription errors.
• DCS Interoperability via 3500 Rack I/O: The 3500 rack outputs a 4–20 mA signal derived from the proximity transducer voltage, compatible with Emerson DeltaV, Honeywell Experion PKS, and ABB 800xA analog input cards. The signal scaling is configurable per channel in the 3500 rack software, allowing engineering units (µm, mil, mm) to be mapped directly to the DCS historian tag.
• Hazardous Area Deployment: The CN-suffix ATEX/IECEx certification covers Zone 1 and Zone 2 gas group IIC (hydrogen) environments, the most stringent classification in the IEC 60079 framework. This allows installation in compressor seal gas areas, hydrogen cooler housings, and LNG process zones without additional barrier hardware when used with the certified Proximitor®.
• Diagnostic Transparency via Gap Voltage Monitoring: The continuous DC output voltage provides a real-time indicator of probe-to-shaft gap. A gap voltage outside the –10 ± 2 VDC nominal window at operating speed indicates shaft centerline shift, bearing wear, or probe mounting drift — all detectable without removing the machine from service. This passive diagnostic capability reduces unplanned inspection intervals.
• Multi-Parameter Measurement from a Single Probe: A single 330104-00-08-10-02-CN installation can simultaneously provide radial vibration (AC component, 0–10,000 Hz), shaft average centerline position (DC component), and — when used as a Keyphasor® reference — once-per-revolution phase angle for all other vibration channels in the 3500 rack. This multiplexed measurement reduces the total sensor count per machine train.
• Long-Term Spare Parts Availability: The 3300 XL Series has maintained backward compatibility with the 3500 rack platform since its introduction. Replacement probes, extension cables, and Proximitor® drivers are available as individual line items, allowing targeted component replacement rather than full system swap-out during maintenance windows.

Quality Assurance & Global Logistics

Every 330104-00-08-10-02-CN unit supplied through siemensplc.com is sourced from verified Bently Nevada (Baker Hughes) authorized distribution channels. Incoming inspection at our Xiamen facility covers three mandatory checkpoints: visual and mechanical integrity of the probe tip, connector, and cable armor; gap voltage verification at the nominal 50 mil gap using a calibrated bench fixture; and scale factor confirmation against the factory calibration record within ±1% tolerance. Units that fail any checkpoint are quarantined and returned to the supplier — no rework or repackaging is performed.

Serialized traceability is maintained for every unit. The factory serial number, calibration date, and test data are recorded in our inventory management system and can be provided with each shipment as a Certificate of Conformance (CoC). For applications requiring third-party verification, we can arrange independent calibration laboratory services prior to shipment.

Storage conditions at our Xiamen warehouse are controlled at 15–25°C and 40–60% RH, consistent with Bently Nevada’s recommended storage environment for proximity transducer systems. Anti-static packaging is used for all probe assemblies. Shelf life is managed on a FIFO basis with a maximum 24-month storage limit before re-inspection.

Global Logistics from Xiamen, China: In-stock units ship within 1–2 business days via DHL Express, FedEx International Priority, or UPS Worldwide Express. Transit times to major industrial hubs: Singapore 2–3 days, UAE/Saudi Arabia 3–4 days, Germany/Netherlands 3–5 days, USA/Canada 4–6 days. Sea freight consolidation is available for bulk orders exceeding 20 units. Export documentation including commercial invoice, packing list, and HS code 9031.80 classification is prepared for all international shipments. Letter of Credit (L/C) and Telegraphic Transfer (T/T) payment terms are supported for qualified buyers.

Contact Information

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