Bently Nevada 330103-00-03-10-01-CN Proximity Transducer – 3300 XL Series

Bently Nevada 330103-00-03-10-01-CN — 8mm Eddy-Current Proximity Transducer for Continuous Shaft Monitoring

The Bently Nevada 330103-00-03-10-01-CN is an 8mm eddy-current proximity transducer engineered for continuous, non-contact measurement of radial shaft vibration and static position in rotating machinery. Operating as the primary sensing element within the 3300 XL transducer system, this probe converts the electromagnetic coupling between its tip coil and a conductive target shaft into a calibrated DC voltage signal — typically expressed as −200 mV/mil (−7.87 V/mm) — that downstream monitors decode into displacement amplitude and DC gap values. The CN suffix designates the China-market configuration, which retains full electrical and mechanical interchangeability with the global 330103 series while accommodating regional documentation and connector standards.

In a control loop context, this transducer occupies the first and most critical node: it is the physical interface between the rotating shaft and the protection system’s decision logic. Any degradation in transducer linearity, gap calibration, or signal integrity propagates directly into false alarms, missed trips, or incorrect vibration amplitude readings. The 330103-00-03-10-01-CN addresses this by maintaining a ±5% sensitivity tolerance across its linear operating range of 0.25 mm to 2.54 mm (10 mil to 100 mil), ensuring that the −24 VDC bias voltage supplied by the Proximitor® sensor is converted to a stable, repeatable output under shaft speeds from near-zero to beyond 100,000 RPM.

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

Technical Parameters

Hardware Logical Analysis

The 330103-00-03-10-01-CN operates on the principle of high-frequency eddy-current induction. The probe tip houses a precision-wound coil driven by an oscillator circuit within the paired Proximitor® sensor at a carrier frequency typically in the range of 1.0–1.5 MHz. When the probe tip approaches a conductive target, eddy currents are induced on the target surface, loading the coil and reducing its effective impedance. The Proximitor® demodulates this impedance change into a DC voltage proportional to the gap distance — a fundamentally analog, continuous-time measurement with no sampling latency.

EMC Design: The coaxial cable architecture between probe and Proximitor® provides inherent shielding against capacitively coupled interference. The shield is grounded at the Proximitor® end only (single-point grounding), preventing ground loop currents that would otherwise introduce 50/60 Hz noise into the measurement signal. In high-EMI environments — such as variable-frequency drive (VFD) motor rooms or switchgear enclosures — this single-point shield topology maintains signal integrity without requiring additional filtering hardware.

Thermal Stability: The probe coil is wound on a thermally stable ceramic bobbin, and the coil wire uses a controlled-expansion alloy to minimize sensitivity drift across the −35°C to +177°C operating range. Sensitivity shift due to temperature is typically within ±0.05% per °C, which is negligible for most machinery protection applications but should be accounted for in precision position measurement (e.g., differential expansion monitoring on steam turbines).

Mechanical Robustness: The probe body is machined from 316 stainless steel with a PEEK (polyether ether ketone) tip encapsulant, providing resistance to hydrocarbon fluids, steam condensate, and mild acids encountered in refinery and petrochemical environments. The coaxial connector is sealed to IP67, preventing moisture ingress during washdown or high-humidity operation. Thread engagement is M10×1.0 (standard for 8mm probes), compatible with standard Bently Nevada probe holders and lock nuts.

Calibration Traceability: Each 330103-00-03-10-01-CN unit is factory-calibrated against AISI 4140 steel targets on a precision gap fixture traceable to NIST standards. The calibration data is encoded in the part number suffix, ensuring that replacement probes maintain system-level accuracy without field recalibration — a critical requirement for API 670-compliant machinery protection systems where calibration records must be maintained for audit purposes.

System Integration Benefits

• Direct 3300 XL Rack Compatibility: The probe integrates without signal conditioning adapters into any 3300 XL monitor — including the 3300/16 Dual Vibration Monitor, 3300/20 Radial Vibration Monitor, and 3300/25 Keyphasor® Monitor — preserving the deterministic signal chain from shaft to trip relay.
• API 670 Compliance Path: The transducer system meets the sensing requirements of API Standard 670 (5th Edition) for radial vibration and position measurement, simplifying documentation for new installations and insurance audits in oil & gas facilities.
• Zero Mechanical Wear: Non-contact eddy-current sensing eliminates probe wear, bearing loading, and lubrication requirements, reducing maintenance intervals to periodic gap verification rather than component replacement.
• Deterministic Frequency Response: The DC-to-10 kHz flat response captures both low-frequency rotor dynamics (1×, 2× running speed) and high-frequency structural resonances without phase distortion, enabling accurate orbit plot generation in the 3300 XL monitoring software.
• Dual-Function Measurement: A single probe simultaneously delivers AC vibration amplitude (dynamic component) and DC gap voltage (static position), reducing the number of penetrations required through bearing housings and simplifying installation in space-constrained machinery.
• Diagnostic Transparency: The −24 VDC bias supply and output voltage are directly measurable with a standard voltmeter, allowing field technicians to verify probe gap, cable continuity, and Proximitor® health without specialized test equipment.
• Hot-Swap Replacement: The coaxial connector design allows probe replacement without disturbing the extension cable or Proximitor® wiring, minimizing outage duration during corrective maintenance on critical machinery.
• Scalable Redundancy: Multiple 330103-00-03-10-01-CN probes can be installed at 90° angular offset on the same bearing journal to provide X-Y vibration measurement for full orbit analysis, or in 2oo3 voting configurations for TMR (Triple Modular Redundancy) protection architectures.

Quality Assurance & Global Logistics

Every Bently Nevada 330103-00-03-10-01-CN unit supplied by siemensplc.com is sourced through verified channels with full traceability documentation. Units undergo incoming inspection covering connector integrity, coaxial cable continuity, probe tip condition, and label authenticity before entering our inventory. A certificate of conformance accompanies each shipment, and 12-month warranty coverage applies from the date of dispatch.

Our logistics hub is located in Xiamen, China — a major international port city with direct air freight connections to Singapore, Dubai, Frankfurt, Los Angeles, and Tokyo. Standard international shipments are dispatched within 1–3 business days of order confirmation via DHL Express, FedEx International Priority, or UPS Worldwide Expedited, with typical transit times of 3–7 business days to most destinations in Asia-Pacific, Europe, and the Americas. For urgent plant shutdowns or emergency MRO requirements, same-day dispatch is available on confirmed stock items.

All export documentation — including commercial invoice, packing list, certificate of origin, and HS code classification (HS 9031.80 for electronic measuring instruments) — is prepared in compliance with Chinese customs regulations and destination-country import requirements. We have experience shipping to facilities in Southeast Asia, the Middle East, Europe, and North America, and can advise on import duty implications for your specific destination.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
© 2026 siemensplc.com. All rights reserved.