Bently Nevada 330103-03-08-10-02-00 Proximity Transducer – 3300 XL Series

Bently Nevada 330103-03-08-10-02-00 — Eddy-Current Proximity Transducer System for Critical Rotating Machinery Protection

The 330103-03-08-10-02-00 is a factory-matched, three-component proximity transducer system manufactured by Bently Nevada (Baker Hughes) under the 3300 XL platform. It is engineered for continuous, non-contact measurement of shaft radial vibration, axial thrust position, and differential expansion on turbines, compressors, pumps, and other API 670-classified rotating equipment. The system delivers a DC-coupled analog output signal directly compatible with Bently Nevada 3500 Series machinery protection monitor inputs, requiring no signal conditioning intermediary.

Unlike discrete sensor assemblies, the 330103-03-08-10-02-00 is supplied and calibrated as a matched set: an 8 mm eddy-current probe, a 10 ft (3.0 m) extension cable, and a 3300 XL 8 mm Proximitor® driver. The scale factor of 200 mV/mil (7.87 V/mm) is validated across the complete assembly. Substituting any single component from a different part number invalidates the calibration and may produce erroneous alarm or trip outputs — a critical consideration for SIL-rated protection loops.

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

Technical Parameters

Hardware Logical Analysis

The operating principle of the 330103-03-08-10-02-00 is grounded in Faraday’s law of electromagnetic induction. The Proximitor® driver generates a high-frequency carrier signal (nominally 1.0 MHz) that is transmitted through the extension cable to the probe coil. When a conductive target enters the probe’s electromagnetic field, eddy currents are induced on the target surface, loading the probe coil and reducing its effective impedance. The driver’s demodulation circuit converts this impedance variation into a proportional DC voltage output — a linear relationship maintained across the full 0–90 mil gap range.

EMC Design: The probe cable uses a double-layer stainless steel braid shield with 95% optical coverage, providing attenuation of radiated interference exceeding 60 dB at frequencies up to 100 MHz. The TNC coaxial interface between extension cable and driver maintains 50 Ω controlled impedance, preventing signal reflection artifacts that would otherwise appear as false vibration components in the frequency spectrum.

Thermal Stability: The probe coil former is wound on a ceramic mandrel with a coefficient of thermal expansion (CTE) matched to the stainless steel housing. This construction limits scale factor drift to less than ±0.5% across the full –30 °C to +177 °C probe operating range — a critical parameter for bearing housing installations where thermal gradients between cold startup and full-load operation can exceed 120 °C.

Target Material Sensitivity: The eddy-current field penetration depth (skin depth δ) is a function of target conductivity and permeability. For AISI 4140 steel at 1 MHz, δ ≈ 8 µm, which is well within the surface finish tolerance of machined journal shafts. For non-standard alloys (17-4 PH stainless, Inconel 718), the relative permeability deviation from the calibration target requires a material correction factor to be applied at the 3500 monitor card — a configuration step that must be documented in the machinery protection system’s functional safety assessment.

Redundancy Architecture: In dual-voting (2oo2) or triple-redundant (2oo3) protection configurations, multiple 330103-03-08-10-02-00 systems are mounted at 90° angular offsets around the bearing journal. Each channel feeds an independent 3500 monitor input. The 3500 rack’s voting logic compares channel outputs in real time; a single-channel deviation beyond a configurable threshold triggers a diagnostic alert without initiating a spurious trip, preserving plant availability while maintaining protection integrity.

System Integration Benefits

• Zero-wear measurement: Non-contact eddy-current technology eliminates sensor degradation from mechanical contact, supporting continuous 8,760-hour annual operation without scheduled sensor replacement intervals.
• Direct 3500 rack compatibility: The –24 VDC supply and analog voltage output interface directly with 3500/20, 3500/40M, 3500/42M, and 3500/45 monitor modules — no signal conditioning, isolators, or impedance matching required.
• DC-coupled output for static position: Unlike velocity transducers, the DC-coupled output preserves static gap information, enabling simultaneous measurement of dynamic vibration (AC component) and static shaft centerline position (DC component) from a single sensor channel.
• API 670 compliance: The system meets all transducer performance requirements of API Standard 670 (5th Edition), including scale factor accuracy, frequency response, and temperature range — mandatory for machinery protection on API-classified equipment in oil & gas facilities.
• Hazardous area deployment: ATEX/IECEx certification to Zone 1 / Zone 2 (Gas Group IIC, Temperature Class T4) permits installation in classified areas without additional intrinsic safety barriers when used with the approved Proximitor driver.
• Deterministic diagnostic transparency: The Proximitor driver outputs a continuous gap voltage that the 3500 monitor uses for real-time transducer health verification. An open-circuit probe cable produces a driver output of approximately –24 V (rail voltage), which the monitor flags as a transducer not OK (TNK) condition — distinguishing sensor faults from actual machinery events without manual intervention.
• Broadband frequency coverage: The DC–10,000 Hz (–3 dB) frequency response captures subsynchronous instabilities (oil whirl at 0.43–0.48×), synchronous unbalance (1×), and higher-order harmonics (2×, 3×) within a single measurement channel, eliminating the need for parallel sensor types across the vibration frequency spectrum.
• Matched-set traceability: Each 330103-03-08-10-02-00 system is serialized as a matched set. The probe, extension cable, and driver share a common calibration record, enabling full traceability for functional safety documentation under IEC 61511 and ISA 84 requirements.

Quality Assurance & Global Logistics

Every 330103-03-08-10-02-00 unit offered through siemensplc.com is sourced from verified OEM supply chains and authorized Bently Nevada distribution channels. Incoming inspection covers visual integrity of the probe tip and armored cable, connector seating and locking torque verification, and functional output check against factory-published scale factor tolerances using a calibrated gap simulator.

Certificate of Conformance (CoC) and factory test reports are available upon request for applications requiring functional safety documentation. Units are stored in ESD-controlled, climate-regulated warehouse conditions in Xiamen, China, maintaining component integrity prior to shipment.

Logistics are handled via DHL Express, FedEx International Priority, and UPS Worldwide Expedited, with full export documentation including commercial invoice, packing list, and HS code declaration (HS 9031.80). Standard in-stock orders are dispatched within 2–3 business days. Expedited same-day dispatch is available for confirmed orders received before 14:00 CST. Delivery to major industrial hubs in Europe, North America, Southeast Asia, and the Middle East typically completes within 3–7 business days from Xiamen.

All shipments include tamper-evident packaging with individual unit identification. A 12-month warranty covers manufacturing defects under normal operating conditions, with advance replacement available for critical plant applications subject to prior arrangement.

Contact Information

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