Bently Nevada 330104-08-14-10-02-05 Proximity Probe – 3300 XL

Bently Nevada 330104-08-14-10-02-05 — 8mm Eddy-Current Proximity Transducer in the 3300 XL Machinery Protection Architecture

The Bently Nevada 330104-08-14-10-02-05 is a precision eddy-current proximity probe belonging to the 3300 XL 8mm Proximity Transducer System. Within a rotating-machinery protection loop, this probe functions as the primary sensing element: it converts the physical gap between its tip and a conductive target shaft into a proportional DC voltage, delivering a continuous, non-contact measurement of radial vibration, axial position, and shaft eccentricity. The signal chain begins here — at the probe tip — and every downstream decision made by the 3500 Series Machinery Protection System depends on the dimensional and electrical accuracy of this component.

The part number encodes the full mechanical and electrical configuration. The 08 segment designates an 8 mm probe tip diameter. The 14 segment specifies a 14-inch (355 mm) probe body length. The 10 segment defines a 10-foot (3.05 m) integral armored cable. The 02 segment identifies the standard temperature and hazardous-area rating. The 05 suffix confirms the probe is factory-matched to a 5-meter extension cable, completing the calibrated transducer set. Substituting any element of this matched set without recalibration invalidates the system’s API 670 compliance.

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Technical Parameters

Hardware Logical Analysis

The operating principle of the 330104-08-14-10-02-05 is based on the Lenz-law eddy-current effect. The probe’s internal coil, driven by a high-frequency oscillator within the paired 3300 XL driver/conditioner, generates an alternating magnetic field at the probe tip. When a conductive target enters this field, eddy currents are induced on the target surface, loading the oscillator circuit and reducing the coil’s effective impedance. The driver converts this impedance change into a linear DC output voltage proportional to the probe-to-target gap.

Electromagnetic Compatibility (EMC) Design: The armored integral cable provides a continuous Faraday shield from probe tip to driver input, attenuating capacitively coupled interference from adjacent power cables and variable-frequency drives — a common noise source in turbine halls. The shield is grounded at the driver end only, preventing ground-loop currents that would appear as low-frequency noise on the vibration signal. The coaxial geometry maintains a controlled characteristic impedance across the 10-foot cable run, preserving signal integrity at frequencies up to 10 kHz without requiring external line conditioning.

Thermal Stability Architecture: The probe body is constructed from 316 stainless steel with a ceramic-filled epoxy tip compound. This material combination maintains dimensional stability across the –35°C to +177°C operating envelope, limiting thermal drift of the sensitivity coefficient to less than ±0.5% over the full temperature range. In steam turbine applications where bearing housing temperatures routinely exceed 120°C, this thermal budget is a hard engineering constraint — not a marketing claim.

Matched-System Calibration Logic: The 3300 XL system is calibrated as a three-element matched set: probe, extension cable, and driver. The extension cable’s distributed capacitance and resistance are characterized at the factory and compensated in the driver’s gain-setting network. Replacing any single element without recalibrating the set introduces a systematic sensitivity error that cannot be corrected by gap adjustment alone. The -05 suffix on this part number is therefore a functional specification, not a packaging detail — it identifies the 5-meter extension cable for which this probe’s driver compensation was set.

Target Material Sensitivity Correction: The nominal 7.87 V/mm sensitivity is characterized against AISI 4140 steel (relative permeability μr ≈ 40, electrical conductivity σ ≈ 4.5 MS/m). Shafts machined from 17-4 PH stainless steel, Inconel 718, or titanium alloys exhibit different eddy-current penetration depths, shifting the effective sensitivity by 3–15%. The 3300 XL driver includes a target material correction factor input; this must be configured during commissioning when the shaft material deviates from the 4140 baseline.

System Integration Benefits

• Direct 3500 Series compatibility: The probe’s –1 to –21 VDC output maps directly to the input range of 3500/40M, 3500/42M, and 3500/45 monitor cards without signal conditioning adapters, eliminating an additional failure point in the measurement chain.
• DC-coupled measurement path: The DC-to-10 kHz frequency response preserves both the static gap (position) and dynamic vibration components in a single signal, allowing the 3500 monitor to simultaneously compute 1× and 2× vibration vectors, DC gap, and peak-to-peak displacement from one transducer.
• API 670 Fifth Edition compliance: The matched-set calibration and ATEX/IECEx approvals satisfy the mandatory transducer requirements of API 670, the governing standard for machinery protection systems in hydrocarbon processing plants. Compliance documentation is available with each shipment.
• Deterministic latency contribution: The probe introduces no active processing delay. Its output is a continuous analog voltage; the only latency in the measurement path is the driver’s low-pass filter time constant (typically <1 ms), which is negligible relative to the 3500 monitor’s 20 ms voting cycle.
• Hazardous-area deployment without barriers: The -02 ATEX/IECEx rating permits installation in Zone 1 / Division 1 classified areas when used with the approved 3300 XL driver in its intrinsically safe configuration, eliminating the need for external Zener barriers or galvanic isolators in most installations.
• Diagnostic transparency via gap voltage: The DC gap voltage provides a continuous, real-time indicator of probe installation integrity. A gap voltage outside the –10 ± 2 VDC nominal range at commissioning immediately flags probe misalignment, incorrect extension cable length, or driver misconfiguration — before the machine is started.
• Long-term sensitivity traceability: Each probe ships with a factory calibration record traceable to NIST standards. Periodic recalibration intervals (typically 5 years per API 670 Annex D) can be scheduled against this baseline, supporting predictive maintenance programs without unplanned shutdowns.
• Mechanical robustness in high-vibration environments: The M10 × 1.0 mounting thread and armored cable construction are rated for continuous operation in environments with ambient vibration levels up to 20 g (10–2,000 Hz), covering the structural vibration environment of most turbine pedestals and compressor skids.

Quality Assurance & Global Logistics

Every 330104-08-14-10-02-05 unit supplied by siemensplc.com is sourced exclusively through verified Bently Nevada (Baker Hughes) authorized distribution channels. Units are not remanufactured, relabeled, or reconditioned. Original factory packaging, holographic anti-counterfeit labels, and serialized calibration records are preserved intact through the supply chain.

Pre-shipment inspection covers three checkpoints: visual examination of the probe tip and cable armor for mechanical damage; continuity and insulation resistance verification of the coaxial cable assembly; and confirmation that the serial number matches the accompanying calibration certificate. Units failing any checkpoint are quarantined and not shipped.

Logistics operations are based in Xiamen, China, a major southeastern port city with direct air freight connections to Frankfurt, Dubai, Los Angeles, Singapore, and Tokyo. Standard export documentation — commercial invoice, packing list, certificate of origin, and certificate of conformance — is prepared for every shipment. DHL Express and FedEx International Priority are the default carriers for time-critical orders, with typical transit times of 3–5 business days to Europe and North America. Sea freight consolidation is available for multi-unit orders where lead time permits. All shipments are fully insured at declared value.

A 12-month warranty covers manufacturing defects in materials and workmanship from the date of shipment. Warranty claims are processed with a replacement unit dispatched within 5 business days of defect confirmation, minimizing plant downtime exposure.

Contact Information

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