Bently Nevada 330103-00-11-10-02-05 Proximity Probe – 3300 XL Series

Bently Nevada 330103-00-11-10-02-05 — 8mm Eddy Current Proximity Probe for 3300 XL Transducer Systems

In rotating machinery protection, the proximity probe occupies a position of singular criticality. It is the only sensor that delivers continuous, non-contact displacement data from a spinning shaft — data that feeds directly into trip logic, alarm thresholds, and condition monitoring databases. The Bently Nevada 330103-00-11-10-02-05 is an 8mm eddy current proximity probe engineered for the 3300 XL Proximity Transducer System. Its configuration — 11-inch (279 mm) probe body, 10-foot (3 m) integral armored cable, and a 2-meter extension cable — is the standard deployment variant across gas turbines, steam turbines, centrifugal compressors, and large pump trains operating under API 670 machinery protection mandates.

The operating principle is straightforward in concept but demanding in execution. A high-frequency oscillator within the driver circuit drives an alternating magnetic field through the probe tip coil. When a conductive target — typically an AISI 4140 steel shaft — enters the field, eddy currents are induced on the target surface. These currents load the oscillator, producing a voltage change at the driver output that is linearly proportional to the gap between probe tip and shaft surface. The 3300 XL system achieves a nominal sensitivity of 200 mV/mil (7.87 V/mm) across a linear range of 10–90 mil (0.25–2.29 mm), with a flat frequency response from DC to 10,000 Hz (–3 dB). This bandwidth is sufficient to resolve both quasi-static shaft centerline position and high-frequency sub-synchronous instability events simultaneously on a single channel.

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Technical Parameters

Hardware Logical Analysis

The 330103-00-11-10-02-05 probe coil is wound on a ferrite core and encapsulated in a thermoplastic housing rated to 177°C continuous. The coil geometry is optimized for an 8mm tip diameter, which defines the effective sensing field depth — approximately 1× the tip diameter, or roughly 8 mm into the target surface. This geometry constrains the eddy current induction zone to a well-defined annular region, minimizing sensitivity to shaft surface irregularities outside the measurement axis.

The integral coaxial cable uses a low-loss dielectric with a characteristic impedance matched to the 3300 XL driver input. Cable capacitance per unit length is controlled within tight tolerances; any deviation shifts the oscillator resonant frequency and introduces a gain error at the driver output. This is why the 330103 series encodes cable length directly in the part number — the -10- segment denotes a 10-foot integral cable, and the -02- segment denotes a 2-meter extension. Mixing cable lengths from different part number configurations without recalibrating the driver will produce a systematic offset error across the entire linear range.

EMC performance is achieved through the coaxial shield construction, which provides greater than 60 dB of common-mode rejection against radiated interference from adjacent variable-frequency drives, bus bars, and high-current motor cables — all common sources of electromagnetic noise in turbomachinery enclosures. The shield is grounded at the driver end only, preventing ground loop currents that would otherwise appear as low-frequency noise on the output signal. The probe housing is electrically isolated from the mounting threads, allowing the installer to control the ground reference point independently of the mechanical mounting structure.

The driver circuit implements a temperature-compensation network that corrects for the negative temperature coefficient of the probe coil resistance. Without this compensation, a 100°C rise in probe tip temperature would introduce a gap measurement error of approximately 3–5 mil — sufficient to mask a genuine shaft displacement event or trigger a nuisance alarm. The 3300 XL driver’s compensation network reduces this thermal error to less than 0.5 mil across the full operating temperature range.

System Integration Benefits

• Direct API 670 Compliance: The 330103-00-11-10-02-05 meets the transducer performance requirements of API 670 Fifth Edition, including sensitivity tolerance (±5%), linearity (±0.5% of full-scale output), and temperature stability — eliminating the need for additional qualification testing in regulated facilities.
• Deterministic DC-Coupled Output: The DC-coupled output voltage allows the 3500 Series monitor to resolve both static shaft position (gap DC component) and dynamic vibration (AC component) from a single channel, reducing wiring complexity and channel count in the protection rack.
• Plug-Compatible with 3300 XL Driver Family: The probe interfaces directly with 330180-series drivers without adapter hardware. Replacement of a failed probe in the field requires no driver recalibration provided the part number configuration is identical, minimizing mean time to repair (MTTR) during unplanned outages.
• 10 kHz Bandwidth for Sub-Synchronous Diagnostics: The flat frequency response to 10,000 Hz captures oil whirl (typically 0.43–0.48× running speed), oil whip, and rub-induced sub-synchronous components that are invisible to accelerometer-based systems at low shaft speeds.
• Non-Contact Measurement — Zero Mechanical Wear: The eddy current sensing mechanism imposes no mechanical load on the shaft and has no moving parts. Mean time between failures (MTBF) for the probe assembly in a clean, within-temperature-rating installation exceeds 100,000 hours of continuous operation.
• High-Temperature Probe Tip Rating (+177°C): Enables installation in bearing housings and turbine pedestals where surface temperatures exceed the limits of piezoelectric accelerometers, without requiring thermal standoffs or cooling provisions.
• Armored Integral Cable for Harsh Environments: The cable jacket is resistant to turbine lube oil, hydraulic fluid, and cleaning solvents. The armor layer provides mechanical protection against abrasion in cable trays shared with power conductors.
• Traceable Calibration Chain: Each 3300 XL probe is factory-calibrated against NIST-traceable standards. The calibration data is encoded in the part number suffix, allowing the 3500 monitor to apply the correct scale factor automatically when the transducer type is configured in the rack software.

Quality Assurance & Global Logistics

Every unit of the Bently Nevada 330103-00-11-10-02-05 offered through siemensplc.com is sourced as genuine Baker Hughes / Bently Nevada product. Upon receipt at our Xiamen, China facility, each probe undergoes a structured incoming inspection protocol: part number label verification against the physical configuration, connector pin-out continuity check, cable shield integrity measurement, and visual inspection of the probe tip encapsulation for mechanical damage or moisture ingress. Units that do not pass all inspection criteria are quarantined and not offered for sale.

Storage follows ESD-safe, climate-controlled warehouse conditions — temperature maintained at 18–25°C, relative humidity below 60% — consistent with Bently Nevada’s long-term storage recommendations for coaxial transducer assemblies. Original manufacturer packaging is preserved where available; units requiring repackaging are sealed in anti-static bags with desiccant and labeled with the inspection date and inspector ID.

Export logistics from Xiamen are handled through established freight forwarding partnerships with DHL Express, FedEx International Priority, and sea freight consolidators for volume orders. Standard air freight transit times to major industrial hubs: Europe 3–5 business days, North America 4–6 business days, Southeast Asia 2–3 business days, Middle East 4–5 business days. Full export documentation is provided as standard: commercial invoice, packing list, certificate of origin (China), and HS code declaration (HS 9031.80). Additional documents — Form E (ASEAN), EUR.1, or third-party inspection certificates — are available upon request with advance notice.

All shipments are covered by a 12-month warranty from the date of shipment against manufacturing defects. Warranty claims are processed with a target response time of 48 hours from receipt of the defective unit and supporting documentation.

Contact Information

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