Bently Nevada 330102-00-24-10-02-00 Proximity Probe – 3300 XL Series

Bently Nevada 330102-00-24-10-02-00 — 8mm Eddy-Current Proximity Probe for Continuous Shaft Monitoring

The Bently Nevada 330102-00-24-10-02-00 is an 8mm eddy-current proximity transducer belonging to the 3300 XL Proximity Transducer System. Within a rotating-machinery protection loop, this probe occupies the first and most critical measurement node: it converts shaft displacement into a proportional DC voltage signal with a sensitivity of 7.87 V/mm (200 mV/mil), feeding that analog output directly to a paired Proximitor® sensor or a 3500-series monitor card. The probe’s non-contact operating principle eliminates mechanical wear at the measurement interface, making it suitable for continuous, uninterrupted service in steam turbines, centrifugal compressors, and high-speed pumps where bearing clearance and rotor orbit data must be available at all times.

The 330102-00-24-10-02-00 variant encodes a specific mechanical configuration: 8mm probe tip, 24-inch (610 mm) integral armored cable, standard 10-32 coaxial connector, and a non-armored cable jacket rated for general industrial environments. The probe body is machined from 316 stainless steel, providing corrosion resistance in oil-mist and process-gas atmospheres. The tip assembly uses a wound coil embedded in a thermoplastic housing, with the coil geometry optimized for the 3300 XL driver’s oscillator frequency — typically 1 MHz — to maintain linear range accuracy across the full operating temperature envelope.

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Technical Parameters

Hardware Logical Analysis

The 330102-00-24-10-02-00 operates on the eddy-current (inductive) measurement principle. The probe coil, driven by the paired Proximitor® sensor at approximately 1 MHz, generates a high-frequency electromagnetic field that penetrates the target shaft surface. As the shaft moves axially or radially, the coupling impedance between the coil and the conductive target changes, modulating the oscillator’s amplitude. The Proximitor® demodulates this amplitude variation and outputs a DC voltage proportional to the air gap — a fundamentally passive measurement at the probe end, with all active electronics residing in the driver module.

EMC Design: The coaxial cable construction provides inherent shielding against capacitively coupled interference. The shield is grounded at the Proximitor® end only (single-point ground), preventing ground-loop currents that would appear as low-frequency noise on the output. In environments with high radiated EMI — such as variable-frequency drive (VFD) motor rooms or switchgear panels — the 330102 series cable jacket provides an additional layer of attenuation. The probe body’s stainless-steel housing acts as a Faraday enclosure for the coil assembly, reducing susceptibility to electric-field interference from adjacent conductors.

Thermal Stability: The coil winding uses a temperature-compensated formulation. Sensitivity drift across the −50°C to +177°C probe body range is specified at less than ±0.5% of full-scale output per 10°C change, which is critical in steam turbine bearing housings where metal temperatures can vary by 80–100°C between cold startup and full-load operation. This thermal stability eliminates the need for software correction tables in most API 670-compliant monitoring systems.

Mechanical Robustness: The 10-32 coaxial connector uses a stainless-steel body with a PTFE dielectric insert, rated for repeated mating cycles without degradation of contact resistance. The integral cable’s armor braid provides crush resistance during installation in tight bearing-housing access ports. The probe tip’s thermoplastic housing is resistant to lubricating oils, synthetic turbine fluids (Type II ester), and common cleaning solvents used in turbine maintenance.

System Integration Benefits

• Direct 3300 XL System Compatibility: The 330102-00-24-10-02-00 is factory-calibrated for use with Bently Nevada 3300 XL Proximitor® sensors (e.g., 330180 series). No field calibration of sensitivity is required; the system achieves rated accuracy immediately upon installation with correct gap setting.
• API 670 Compliance: The probe meets the transducer performance requirements of API Standard 670 (5th Edition) for radial vibration, axial position, and differential expansion measurement. This simplifies documentation for new installations in refineries, LNG plants, and power generation facilities subject to API machinery protection standards.
• Deterministic Signal Latency: Because the probe is a passive element with no onboard signal processing, measurement latency is determined solely by the Proximitor® demodulator bandwidth. With the 3300 XL driver, the −3 dB frequency response extends to 10,000 Hz, providing sub-100 µs signal latency — sufficient to capture sub-synchronous instability events and blade-passing frequencies in high-speed turbomachinery.
• Plug-and-Play Replacement: The 330102-00-24-10-02-00 is a direct dimensional and electrical replacement for earlier 3300 series 8mm probes. Existing conduit entries, bracket mounts, and Proximitor® wiring require no modification, reducing planned maintenance downtime to the time required for gap resetting only.
• Diagnostic Transparency: The 3300 XL system’s DC output voltage provides a continuous, readable gap indicator. Maintenance technicians can verify probe-to-shaft gap with a standard DC voltmeter without interrupting the monitoring loop, enabling in-service gap checks during scheduled walk-downs.
• Hazardous-Area Deployment: ATEX and FM certifications (Zone 1/2, Gas Group IIC) allow installation in classified areas without additional intrinsic safety barriers in most configurations. This reduces BOM complexity for offshore platform and petrochemical plant installations.
• Multi-Axis Measurement Flexibility: A single probe model covers radial vibration (X–Y pair), axial position, differential expansion, and eccentricity measurement applications. Stocking a single part number satisfies multiple measurement-point types across a turbine train, simplifying spare-parts inventory management.
• Long-Term Availability: The 3300 XL platform has been in continuous production for over two decades. Bently Nevada maintains backward compatibility across driver and monitor generations, protecting the capital investment in existing wiring infrastructure when monitor cards are upgraded to 3500-series or System 1 platforms.

Quality Assurance & Global Logistics

Every 330102-00-24-10-02-00 unit dispatched from our Xiamen, China facility is sourced through verified supply channels and subjected to a structured pre-shipment inspection protocol. Physical inspection covers label integrity, connector thread condition, cable jacket continuity, and tip-surface condition. Electrical verification confirms that the probe’s coil impedance falls within the manufacturer’s specified tolerance band, using a calibrated LCR meter traceable to national standards. Units that fail any inspection criterion are quarantined and not shipped.

Packaging follows anti-static and mechanical protection standards: the probe is individually wrapped in ESD foam, placed in a rigid cardboard insert, and sealed in a moisture-barrier outer carton. Each shipment includes a packing list with part number, serial number (where available), and inspection date. A 12-month warranty covers manufacturing defects and premature failure under normal operating conditions. Warranty claims are processed within 5 business days of receipt of the returned unit.

Logistics from Xiamen cover all major global destinations. DHL Express and FedEx International Priority are the primary carriers, with typical transit times of 3–5 business days to Europe, 4–6 days to North America, and 2–4 days to Southeast Asia. Air freight consolidation is available for bulk orders. Commercial invoices include HS Code 9031.80.8085 for customs classification. Export documentation — including packing lists, commercial invoices, and certificates of origin — is prepared to meet the import requirements of the destination country.

Contact Information

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