Bently Nevada 330103-05-10-05-02-00 Proximity Transducer – 3300 XL Series

Bently Nevada 330103-05-10-05-02-00 — Eddy Current Proximity Transducer System for API 670 Machinery Protection

The 330103-05-10-05-02-00 is a factory-matched, three-component eddy current proximity transducer system from Bently Nevada’s 3300 XL platform. It is engineered for continuous, non-contact measurement of shaft radial vibration, axial position, and differential expansion on critical rotating machinery. The system integrates a 330103-series probe, a matched extension cable (1.0 m probe / 2.5 m extension), and a proximitor/oscillator driver into a single calibrated assembly. Separation or substitution of any component invalidates the factory scale factor and calibration traceability.

This transducer system is the specified instrument of choice in API 670-compliant machinery protection installations across oil & gas upstream and downstream, power generation, and petrochemical industries. Its output signal — a DC voltage proportional to probe-to-target gap — interfaces directly with Bently Nevada 3500 Series monitor racks and System 1 condition monitoring software without signal conditioning adapters.

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

Technical Parameters

Hardware Logical Analysis

The 330103-05-10-05-02-00 operates on the principle of electromagnetic impedance modulation. The probe coil, driven at a nominal 1.0 MHz oscillation frequency by the proximitor driver, generates a focused electromagnetic field at its tip. When a conductive target — typically an AISI 4140 steel shaft — enters this field, eddy currents are induced on the target surface. These eddy currents create a counter-magnetic field that loads the probe coil, reducing its effective inductance and increasing resistive losses. The proximitor circuit continuously monitors this impedance shift and converts it into a proportional DC voltage output.

Matched-System Calibration Architecture: The probe, extension cable, and proximitor driver are calibrated as a matched set at the factory. The extension cable’s distributed capacitance and inductance are factored into the driver’s demodulation circuit. Substituting a cable of different length or impedance characteristic shifts the effective scale factor — a deviation that cannot be corrected by field adjustment alone. This architecture ensures that the 7.87 V/mm scale factor is maintained across the full −35°C to +177°C probe temperature range without field recalibration.

EMC Design: The armored coaxial cable construction provides continuous 360° shielding from the probe tip to the driver input. The shield is grounded at the driver end only (single-point grounding), eliminating ground loop currents that would otherwise appear as low-frequency noise on the output signal. In environments with high-frequency switching drives (VFDs) or high-current bus bars, this shielding architecture maintains signal integrity without additional filtering hardware.

Thermal Stability: The probe coil is wound on a ceramic bobbin with a low thermal coefficient of inductance. Combined with the driver’s temperature-compensated demodulation circuit, the system maintains scale factor accuracy within ±0.5% across the full operating temperature range — a critical requirement for axial position measurement on steam turbines where thermal gradients between cold startup and full-load operation can exceed 100°C.

Gap Voltage Linearity: The −2 VDC to −18 VDC output spans the 0–5 mm measurement range with ±1% full-scale linearity. The linear region is bounded by the near-gap limit (probe face contact risk) and the far-gap limit (field strength attenuation). Operating within this window, the output can be directly scaled by monitor input cards without lookup tables or polynomial correction — simplifying commissioning and reducing configuration error risk.

System Integration Benefits

• Direct rack compatibility: Output signal (-2 to -18 VDC, -24V powered) is natively accepted by Bently Nevada 3500/42M, 3500/45, and 3500/46M monitor cards without signal conditioning modules, reducing BOM complexity and potential failure points.
• API 670 compliance out of the box: The complete system meets API 670 Fourth Edition requirements for proximity transducer systems, eliminating the need for third-party compliance verification during plant acceptance testing.
• Deterministic alarm response: The DC-coupled output with 10 kHz bandwidth ensures that high-frequency shaft events (e.g., blade passing frequencies on compressors) are captured without phase lag, enabling the 3500 rack to execute trip logic within its specified 20 ms response time.
• Diagnostic transparency: The gap voltage output is continuously readable by System 1 software, providing real-time probe health monitoring. A gap voltage outside the −10 VDC ±2 VDC nominal operating window triggers a Not OK (NO) condition, distinguishing sensor faults from actual machinery events.
• Zero mechanical wear: Non-contact measurement eliminates probe wear, bearing loading, and lubrication requirements. Mean time between maintenance (MTBM) intervals are defined by process contamination risk rather than mechanical fatigue — typically 4–8 years in clean environments.
• Multi-parameter capability: A single probe installation can simultaneously provide radial vibration (AC component) and average shaft centerline position (DC component) to separate monitor channels, reducing the number of shaft penetrations required in the bearing housing.
• Hazardous area deployment: The system is compatible with Bently Nevada’s Zener barrier and galvanic isolator accessories for ATEX/IECEx Zone 1 and Zone 2 installations, extending its applicability to offshore platforms and onshore gas processing facilities.
• Interchangeability within the 3300 XL family: The 330103 probe series maintains dimensional and electrical compatibility across the 3300 XL platform. Replacement units can be installed without re-entering calibration constants into the monitor rack, provided the matched cable and driver are replaced as a set.

Quality Assurance & Global Logistics

Every 330103-05-10-05-02-00 unit dispatched from our Xiamen, China facility is sourced from authorized Bently Nevada distribution channels or verified surplus inventory with full documentation traceability. Incoming inspection covers visual integrity of the probe body and connector, armored cable continuity and shield resistance, and functional output verification against the nominal gap-voltage curve using a calibrated test fixture.

Units are serialized, and the serial number is recorded against each shipment for your asset management and maintenance records. Factory calibration documentation and certificates of conformance are available upon request and are routinely provided for plant acceptance packages.

Packaging is engineered for international transit: anti-static inner bag, moisture-barrier sealed pouch with desiccant, and foam-lined outer carton rated for air freight handling. Export documentation — commercial invoice, packing list, HS code declaration (HS 9031.80), and certificate of origin — is prepared for every shipment. Standard dispatch from Xiamen is 1–3 business days for in-stock units, with DHL Express, FedEx International Priority, and UPS Worldwide Express available as carrier options. Estimated transit times: Southeast Asia 2–4 days, Europe 3–5 days, North America 3–5 days, Middle East 4–6 days.

A 12-month warranty covers manufacturing defects and functional failure under normal operating conditions. Warranty claims are processed with a replacement-first policy to minimize your plant downtime exposure.

Contact Information

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