Bently Nevada 330103-10-25-10-02-00 Proximity Transducer System – 3300 XL Series

Bently Nevada 330103-10-25-10-02-00 — Eddy Current Proximity Transducer System for Rotating Machinery Protection

The 330103-10-25-10-02-00 is a factory-matched, three-component eddy current proximity transducer system from Bently Nevada’s 3300 XL platform. It is designed for continuous, non-contact measurement of shaft radial vibration, axial position, and differential expansion in critical rotating machinery — gas turbines, steam turbines, centrifugal compressors, and large induction motors. The system integrates a 25 mm probe, a 2 m extension cable, and a Proximitor® sensor into a single calibrated assembly, eliminating field calibration on direct replacement and ensuring measurement traceability to API 670 requirements.

The part number encoding is deterministic: 330103 identifies the probe body series; 10 specifies the 10 mm linear measurement range; 25 denotes the 25 mm probe tip diameter; 10 confirms the standard 200 mV/mil (7.87 V/mm) sensitivity; 02 designates the 2 m extension cable; and 00 indicates the standard Proximitor® configuration. Any substitution of a component from a different part number invalidates the factory calibration and must be treated as a new system requiring full loop calibration.

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

Technical Parameters

Hardware Logical Analysis

Eddy Current Field Generation and Gap Modulation
The probe coil, driven by the Proximitor®’s internal 1.0–1.5 MHz oscillator, generates a high-frequency electromagnetic field that penetrates the conductive shaft target. As the shaft-to-probe gap changes — due to vibration, eccentricity, or axial movement — the eddy currents induced in the target surface alter the coil’s effective impedance. The Proximitor® demodulates this impedance variation and converts it to a DC voltage output linearly proportional to gap distance. The 200 mV/mil sensitivity figure is the slope of this linear transfer function, factory-verified against a certified AISI 4140 steel reference target.

Three-Component Matched System Architecture
The 330103-10-25-10-02-00 is not a standalone probe — it is a calibrated system. The probe, extension cable, and Proximitor® are electrically matched at the factory. The extension cable’s characteristic impedance is controlled to maintain the oscillator’s Q-factor and prevent resonance shifts that would alter sensitivity. Substituting any single component from a different part number changes the total cable capacitance and inductance, shifting the operating point of the oscillator and introducing a systematic sensitivity error that cannot be corrected by zero/span adjustment alone.

EMC Design and Shielding Architecture
The coaxial cable assembly uses a double-shielded construction: an inner shield tied to signal ground at the Proximitor® and an outer shield connected to chassis ground at the mounting bracket. This arrangement provides common-mode rejection of radiated interference from adjacent VFDs, motor starters, and high-current bus bars — environments typical in turbomachinery control rooms. The Proximitor® housing is constructed from die-cast aluminum with conductive gasket sealing, achieving a shielding effectiveness consistent with IEC 61000-4-3 Class A requirements.

Thermal Compensation in the Proximitor® Electronics
The Proximitor® incorporates a thermistor-based compensation network within the demodulator stage. As ambient temperature shifts the oscillator’s resonant frequency, the compensation network applies a corrective offset to the DC output, maintaining sensitivity drift below 0.5% across the full −35 °C to +85 °C operating range. This is critical in outdoor turbine enclosures where ambient temperature swings of 60 °C between day and night operation are common.

Intrinsic Safety Barrier Compatibility
The system’s ATEX/FM/CSA intrinsic safety certification defines maximum allowable input parameters (Ui, Ii, Pi) and cable parameters (Ci, Li) for the associated apparatus. When installed in Zone 1 hazardous areas, the Proximitor® must be located outside the hazardous zone and connected through a certified Zener barrier or galvanic isolator. The 330103-10-25-10-02-00’s cable capacitance and inductance values are documented in the ATEX certificate and must be verified against the barrier’s allowable connected apparatus parameters before installation.

System Integration Benefits

• Direct compatibility with Bently Nevada 3500 Series monitors — The −2 to −18 VDC output maps directly to the input range of 3500/40M, 3500/42M, and 3500/46M proximity monitor modules without signal conditioning. Alarm and danger setpoints are configured in the monitor rack, not in the transducer, preserving measurement chain integrity.
• Deterministic real-time response — DC to 10 kHz bandwidth captures sub-synchronous instabilities (oil whirl at 0.43–0.48× running speed), synchronous 1× unbalance, and super-synchronous blade-pass frequencies in a single measurement channel, eliminating the need for parallel sensor installations.
• Zero-recalibration direct replacement — Factory-matched system calibration means a replacement 330103-10-25-10-02-00 can be installed and returned to service without a loop calibration procedure, reducing planned maintenance downtime from hours to minutes.
• Diagnostic transparency via orbit plot generation — Two orthogonally mounted 330103-series probes (X and Y planes, 90° apart) feed the 3500 monitor’s orbit display, providing a real-time Lissajous figure of shaft centerline motion — the primary diagnostic tool for identifying misalignment, rub, and fluid-induced instability.
• SIL-capable measurement loop — When integrated with a SIL-rated safety instrumented system, the transducer’s certified failure mode data (λDD, λDU) supports SIL 2 loop calculations per IEC 61511, enabling use in machinery protection functions with defined PFD targets.
• Hazardous area deployment without additional barriers — ATEX Zone 1 intrinsic safety approval allows probe installation inside turbine casings and compressor seal areas classified as gas group IIC, the most stringent classification, without external explosion-proof enclosures.
• Broad DCS/PLC integration via signal conditioning — The Proximitor® DC output is compatible with standard analog input modules (0–10 V range) on Siemens S7, Rockwell ControlLogix, Emerson DeltaV, and Yokogawa CENTUM platforms when routed through a V-to-I signal conditioner (e.g., 4–20 mA conversion). This enables machinery vibration data to be integrated into plant-wide DCS historian and alarm management systems.
• Long cable run capability — The controlled-impedance coaxial cable design supports total probe-to-Proximitor® lengths up to the rated system length without signal degradation, accommodating installations where the Proximitor® must be located in a remote junction box away from the machine casing.
• Consistent target material response — The 200 mV/mil sensitivity is calibrated for AISI 4140 steel. Documented correction factors for stainless steel (316L), titanium, and Inconel targets are available in the Bently Nevada calibration manual, allowing the same transducer system to be used across mixed-material shaft applications with a known, quantifiable sensitivity adjustment.

Quality Assurance & Global Logistics

Every 330103-10-25-10-02-00 unit dispatched from our Xiamen facility undergoes a structured pre-shipment verification protocol before packaging:

• OEM label and serial number authentication — Part number laser engraving, holographic OEM labels, and serial number cross-reference against Bently Nevada / Baker Hughes distribution records are verified for each unit.
• DC output linearity test — Each Proximitor® output is measured at three gap positions (2 mm, 5 mm, 8 mm) against a certified AISI 4140 steel target. Measured sensitivity must fall within ±1% of the 7.87 V/mm nominal value to pass.
• Connector and cable integrity check — Coaxial connector contact resistance (<5 mΩ) and cable insulation resistance (>100 MΩ at 500 VDC) are verified before dispatch.
• Documentation package — Certificate of conformance, calibration record, ATEX certificate copy, and original OEM datasheet are included with each shipment or provided electronically upon request.
• 12-month warranty — All units carry a 12-month operational warranty against manufacturing defects. Defective units are replaced or refunded in full; no restocking fees apply to warranty claims.

Logistics from Xiamen, China: Standard dispatch via DHL Express or FedEx International Priority. Typical transit times: Southeast Asia 2–3 business days; Europe 3–5 business days; North America 4–6 business days. EXW Xiamen and CIF destination Incoterms both available. HS Code 9031.80 for customs classification. Export documentation (commercial invoice, packing list, certificate of origin) prepared to destination country requirements. Air freight consolidation available for multi-line orders to reduce per-unit shipping cost.

Contact Information

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