Bently Nevada 330104-06-14-05-02-05 Proximity Transducer System – 3300 XL Series

Bently Nevada 330104-06-14-05-02-05 — Eddy-Current Proximity Transducer System for Critical Rotating Machinery Protection

The Bently Nevada 330104-06-14-05-02-05 is a complete eddy-current proximity transducer system belonging to the 3300 XL product family, a platform that has established itself as the de facto standard for shaft radial vibration, axial position, and differential expansion measurement in turbomachinery protection systems worldwide. This assembly integrates a 6-inch (152 mm) probe, a 14-foot (4.3 m) armored interconnect cable, and a 5-foot (1.5 m) extension cable into a single matched set, factory-calibrated to deliver a nominal scale factor of 7.87 V/mm (200 mV/mil) across the full operating gap range.

Unlike general-purpose inductive sensors, the 3300 XL probe tip is wound with a precision coil embedded in a thermally stable epoxy matrix, maintaining dimensional integrity from −35 °C to +121 °C. The driver electronics — housed in a separate proximitor enclosure — generate a 1.0 MHz carrier signal that is amplitude-modulated by the eddy-current field induced in the target shaft surface. This architecture decouples the high-frequency oscillator from the measurement output, allowing the system to maintain a flat frequency response from DC to 10,000 Hz without mechanical contact, wear, or lubrication requirements.

In API 670-governed machinery protection architectures, the 330104-06-14-05-02-05 feeds its −18 Vdc nominal output directly into Bently Nevada 3500 Series monitor cards — specifically the 3500/40M, 3500/42M, and 3500/45 — where the analog voltage is digitized, compared against alert and danger setpoints, and relayed to the plant DCS or safety instrumented system within a single scan cycle. The result is a deterministic signal chain from shaft surface to trip relay with no intermediate signal conditioning required.

This unit is stocked and dispatched from Xiamen, China, with full export documentation. Inquiries and RFQ: [email protected] | WhatsApp: +86 18359268345

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

Technical Parameters

Hardware Logical Analysis

Eddy-Current Measurement Architecture: The 330104-06-14-05-02-05 operates on the principle of electromagnetic induction. The probe coil, driven at 1.0 MHz by the proximitor oscillator, generates a high-frequency magnetic field that penetrates the conductive target surface. As the air gap between probe tip and shaft changes, the eddy-current loading on the coil changes proportionally, modulating the oscillator amplitude. The proximitor demodulates this signal and outputs a DC voltage linearly proportional to gap distance — a fundamentally non-contact, wear-free measurement mechanism with no moving parts in the signal path.

Matched-System Calibration: The probe, interconnect cable, and extension cable in this assembly are factory-matched as a system. Cable capacitance and inductance are characterized at the factory and compensated in the driver circuit. Substituting any single component with an unmatched part will shift the scale factor outside the ±1% tolerance band, introducing systematic measurement error that cannot be corrected by field calibration alone. This is a critical distinction from generic eddy-current sensors that treat cable length as a field-adjustable parameter.

EMC Design and Shielding: The armored interconnect cable uses a double-shielded coaxial construction — inner braid shield referenced to signal ground, outer armor referenced to chassis ground — providing greater than 60 dB of common-mode rejection against conducted and radiated interference in the 50 Hz to 1 MHz band. This is particularly relevant in turbine halls where variable-frequency drives, high-current bus bars, and RF welding equipment generate broadband electromagnetic noise that can corrupt vibration signals in lesser-shielded systems.

Thermal Stability: The probe coil former is machined from a ceramic-filled PTFE composite with a coefficient of thermal expansion (CTE) matched to the 316 SS housing. This minimizes thermally induced dimensional changes in the coil geometry across the −35 °C to +121 °C operating range, keeping the scale factor drift below 0.05% per °C — a specification that matters in steam turbine bearing housings where metal temperatures can swing 80 °C between cold startup and full-load operation.

Hazardous Area Compatibility: When paired with the Bently Nevada 3300/20 Zener Barrier, the 330104-06-14-05-02-05 is suitable for installation in IEC Zone 1 and Zone 2 classified areas (gas groups IIA, IIB) without requiring an intrinsically safe driver variant. The barrier limits the energy available at the probe terminals to below the ignition threshold for the specified gas groups, while the standard driver remains in the safe area.

System Integration Benefits

• Direct 3500 Series Compatibility: The −18 Vdc output and 200 mV/mil scale factor are natively recognized by all 3500 Series monitor cards without requiring input scaling or signal conditioning modules, reducing BOM complexity and eliminating potential signal chain errors introduced by intermediate converters.
• Deterministic Scan-Cycle Response: Because the transducer output is a continuous analog voltage, the 3500 monitor card samples it at a fixed rate (up to 65,536 samples/second on the 3500/42M), ensuring that transient vibration events — such as blade-pass impulses or rub events — are captured within a single monitor scan cycle and not aliased or missed between samples.
• Dual-Voting Trip Logic Support: In 2oo3 (two-out-of-three) voting architectures, three 330104-06-14-05-02-05 probes can be installed at 120° intervals around the shaft. The 3500 rack compares all three channels and trips only when two or more exceed the danger setpoint, eliminating spurious trips from single-channel sensor faults while maintaining protection against genuine shaft excursions.
• Integrated Self-Diagnostics: The proximitor continuously monitors its own supply voltage and output clamp status. If the probe cable is open-circuited or short-circuited, the output drives to a defined fault state (typically +2 Vdc or −24 Vdc) that the 3500 monitor recognizes as a Not-OK condition, triggering a channel alarm without requiring external watchdog circuitry.
• DCS Interoperability: The 4–20 mA retransmission output available on the 3500 monitor card allows the vibration measurement to be forwarded to Emerson DeltaV, Honeywell Experion, ABB 800xA, or Yokogawa CENTUM VP historian tags without additional signal converters, maintaining measurement traceability from the transducer to the process historian.
• Minimal Commissioning Overhead: Factory-matched calibration means field commissioning is limited to gap verification (target gap set to 1.0 mm / 40 mil for optimal linearity) and a static output check against the known scale factor. No iterative gain adjustment or span calibration is required, reducing commissioning time per measurement point to under 30 minutes for experienced technicians.
• Long-Term Spare Parts Alignment: The 3300 XL platform has maintained backward compatibility with 3500 Series monitors since the platform’s introduction. Stocking 330104-06-14-05-02-05 as a critical spare provides coverage for both new installations and legacy 3300 Series monitor racks (3300/16, 3300/20) still in service at older plants, maximizing spare parts inventory efficiency.
• Reduced Maintenance Interval Impact: Non-contact measurement eliminates the probe-to-shaft wear mechanism present in contact-type displacement sensors. In continuous-duty turbomachinery applications running 8,000+ hours per year, this translates to a sensor service life measured in years rather than months, with replacement driven by calibration drift rather than mechanical degradation.

Quality Assurance & Global Logistics

Every 330104-06-14-05-02-05 unit dispatched from our Xiamen facility is a factory-new, genuine Bently Nevada (Baker Hughes) assembly. Each unit carries the OEM holographic authenticity label, a traceable serial number, and a date code that can be cross-referenced against Baker Hughes production records. We do not stock refurbished, reconditioned, or grey-market inventory. Units are stored in a climate-controlled warehouse at 20–25 °C and 40–60% RH to prevent moisture ingress into the cable connectors and probe tip assembly.

Pre-shipment inspection covers visual integrity of the probe tip, connector seating, cable armor continuity, and label legibility. A static output check is performed on each unit using a calibrated test fixture to verify the scale factor is within ±1% of 200 mV/mil before packaging. Units are packed in anti-static foam inserts inside double-wall corrugated cartons, with desiccant sachets and a humidity indicator card included in each shipment.

Logistics from Xiamen to major industrial hubs: DHL Express (2–4 business days to Europe, Middle East, Southeast Asia; 3–5 days to Americas), FedEx International Priority (2–3 days to North America), and UPS Worldwide Express (2–4 days to Australia and Pacific). All shipments include a commercial invoice, packing list, certificate of origin, and HS Code 8543.70.90 export declaration. For orders requiring a Certificate of Conformance or material traceability report, these are prepared at no additional charge and included in the shipment documentation package.

A 12-month warranty against manufacturing defects is provided on all units. Warranty claims are processed within 5 business days of receipt of the returned unit at our Xiamen facility, with replacement units dispatched by express courier at our cost for confirmed defective items.

Contact Information

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