Bently Nevada 330103-05-19-10-02-CN Proximity Transducer – 3300 XL

Bently Nevada 330103-05-19-10-02-CN: 8mm Eddy-Current Proximity Transducer in the 3300 XL Machinery Protection Architecture

The 330103-05-19-10-02-CN is a factory-configured, three-component eddy-current proximity transducer system manufactured by Bently Nevada (a Baker Hughes company) under the 3300 XL platform. It is designed for continuous, non-contact measurement of radial shaft vibration, axial position, and differential expansion in critical rotating machinery — turbines, centrifugal compressors, boiler feed pumps, and gearboxes — where API 670 compliance is mandatory and measurement latency is not tolerable.

This part number encodes a specific cable geometry: 0.5 m armored extension cable, 1.9 m integral probe cable, 1.0 m driver cable, and a CN-suffix oscillator-demodulator driver. The complete system delivers a calibrated output of 7.87 V/mm (200 mV/mil) across a linear range of 0.25 mm to 2.26 mm, feeding directly into 3300 XL monitor racks or Orbit 60 Series systems without recalibration.

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Technical Parameters

Hardware Logical Analysis

The 330103-05-19-10-02-CN operates on a three-node signal chain: probe → extension cable → oscillator-demodulator driver. Understanding the physics at each node is essential for correct installation and fault diagnosis.

Probe Oscillator Circuit: The 8mm probe tip houses a wound coil driven by a high-frequency oscillator (typically 1.0 MHz carrier) embedded in the driver module. When the conductive target (shaft) enters the electromagnetic field, eddy currents are induced on the shaft surface, loading the oscillator and reducing its amplitude. The driver’s demodulator circuit converts this amplitude change into a DC voltage proportional to the air gap — a fundamentally linear relationship within the calibrated range of 0.25–2.26 mm.

EMC Design: The armor-jacketed coaxial cable assembly provides continuous 360° shielding from the probe tip to the driver input. This construction suppresses capacitive coupling from adjacent power cables and rejects common-mode noise generated by variable-frequency drives (VFDs) and high-current motor starters — both prevalent in turbomachinery environments. The TNC connector interface maintains shield continuity at the junction point, preventing ground loop injection that would otherwise appear as low-frequency noise on the DC output.

Thermal Stability: The probe coil is wound with a temperature-compensated formulation. Over the full –35°C to +177°C probe range, scale factor drift is maintained within ±1% of nominal — a critical parameter for axial position monitoring where a 0.1 mm measurement error can trigger a false trip on a steam turbine thrust bearing. The CN-suffix driver incorporates an internal temperature compensation network that corrects for cable capacitance variation across the –35°C to +85°C driver range.

Cable Impedance Matching: The 0.5 m extension cable is impedance-matched to the probe’s coaxial geometry. Mismatched or field-spliced cables introduce reflections at the carrier frequency, degrading the linearity of the demodulated output. The factory-configured cable lengths in this part number (05 = 0.5 m extension, 19 = 1.9 m integral, 10 = 1.0 m driver) are validated as a matched set — substituting individual components requires re-verification of the complete system scale factor.

Redundancy Compatibility: The CN-suffix driver is compatible with 3300 XL dual-voting monitor architectures. In a 2-out-of-3 (2oo3) voting configuration, three independent 330103 systems monitor the same shaft plane; the monitor rack arbitrates between channels and suppresses single-channel faults without generating a spurious trip. This architecture is standard in API 670 installations on critical compressor trains.

System Integration Benefits

• Direct rack compatibility: Plug-and-play with 3300 XL monitor cards (3300/16, 3300/20, 3300/46) and Orbit 60 Series monitors — no field calibration required when replacing a like-for-like unit within the same cable configuration.
• Deterministic DC output: The –1 VDC to –17 VDC output range is a hard-wired analog signal with zero protocol overhead, ensuring sub-millisecond response to gap changes — essential for machinery protection trip functions where relay actuation must occur within one shaft revolution.
• Broadband frequency coverage: DC–10 kHz bandwidth captures both quasi-static axial position drift and high-frequency subsynchronous instabilities (oil whirl, oil whip) in a single channel, eliminating the need for separate position and vibration transducers on the same bearing plane.
• Non-contact wear immunity: Zero mechanical contact between probe and shaft means no wear-induced drift over the service life. Calibration intervals can be extended to planned turnaround cycles (typically 4–6 years) rather than calendar-based schedules.
• Hazardous area certification: ATEX and IECEx approvals allow installation in Zone 1/Zone 2 classified areas without additional barriers in most configurations — reducing BOM complexity in offshore and refinery installations.
• Diagnostic transparency: The DC output voltage at any moment directly indicates the physical air gap. A technician with a voltmeter can verify probe installation gap, detect probe fouling (gap reduction), or identify shaft eccentricity without specialized test equipment.
• Backward compatibility: The 3300 XL system maintains electrical compatibility with legacy 3300 (non-XL) monitor racks in most configurations, protecting existing infrastructure investment during phased upgrades.
• Standardized scale factor: The 200 mV/mil output is the industry-standard sensitivity for 8mm eddy-current probes, ensuring interoperability with third-party DCS historian tags, alarm setpoints, and vibration analysis software (e.g., System 1, OSIsoft PI) without rescaling.

Quality Assurance & Global Logistics

Every 330103-05-19-10-02-CN unit supplied through siemensplc.com is sourced from verified industrial distribution channels and undergoes a structured pre-shipment inspection protocol before leaving our Xiamen, China facility:

• OEM label, part number, and date code verification against Bently Nevada factory documentation
• Visual inspection of probe tip geometry, cable jacket integrity, and TNC connector seating
• Coaxial cable continuity and shield resistance check
• Packaging inspection — original or equivalent anti-static, impact-resistant protective packaging confirmed
• Certificate of Conformance (CoC) issued with every shipment; third-party test reports available on request for critical plant applications

Shipments are dispatched via DHL Express or FedEx International Priority from Xiamen, China. Typical transit time is 3–5 business days to major industrial hubs in Southeast Asia, the Middle East, and Europe; 5–7 business days to North and South America. Full commercial documentation — commercial invoice, packing list, CoC — is provided with every order to support customs clearance and plant receiving inspection. Air freight tracking numbers are issued within 24 hours of dispatch.

Contact Information

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