Bently Nevada 330104-15-23-50-02-00 Proximity Probe – 3300 XL Series

Bently Nevada 330104-15-23-50-02-00 — Eddy-Current Proximity Probe for Continuous Shaft Vibration Measurement

The Bently Nevada 330104-15-23-50-02-00 is a passive eddy-current proximity probe belonging to the 3300 XL Series transducer system. Its primary function within a machinery protection loop is to convert the radial gap between the probe tip and a conductive target surface into a proportional DC voltage signal, enabling real-time measurement of shaft vibration displacement, relative shaft position, and differential expansion in rotating machinery. The probe operates as the sensing element of a three-component measurement chain: probe body, extension cable, and proximitor module. Each component is factory-matched and calibrated as a system to maintain the ±0.5% linearity specification across the full 50 mil (1.27 mm) linear range.

In turbine and compressor protection architectures, this probe is typically installed in X–Y orthogonal pairs at each bearing journal, feeding displacement data to a Bently Nevada 3500 or 3300 rack. The rack’s I/O module digitises the ±24 VDC proximitor output at a sample rate sufficient to resolve sub-synchronous, synchronous, and super-synchronous vibration components. Alert and danger setpoints are enforced in hardware, ensuring trip response times independent of host DCS scan cycles.

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

Technical Parameters

Hardware Logical Analysis

The 330104-15-23-50-02-00 operates on the Lenz’s law induction principle. The proximitor module drives a high-frequency oscillating current through the probe coil, generating an electromagnetic field that extends axially from the 15 mm tip face. When a conductive target enters this field, eddy currents are induced on the target surface, loading the oscillator circuit and reducing coil impedance. The proximitor’s demodulator circuit converts this impedance change into a DC output voltage with a scale factor of 200 mV/mil.

EMC Design: The armored integral cable provides continuous coaxial shielding from the probe body to the proximitor input, suppressing common-mode noise injection from adjacent power cables and variable-frequency drives. The shield is grounded at the proximitor end only, forming a single-point ground that prevents shield current loops. This topology maintains signal integrity in environments with conducted EMI levels up to 10 V/m per IEC 61000-4-6.

Thermal Stability: The probe coil is wound on a ceramic bobbin with a low thermal coefficient of expansion. Over the –35 °C to +177 °C operating range, the scale factor drift is held within ±1% of nominal, eliminating the need for temperature compensation in most turbine bearing housings. The 316 stainless steel housing resists hydrogen sulfide and chloride environments encountered in oil and gas applications.

Mechanical Robustness: The 15 mm tip diameter provides a larger sensing area than 8 mm probes, reducing sensitivity to surface finish irregularities on the shaft journal. The armored cable withstands continuous vibration at 20 g, 10–2,000 Hz per MIL-STD-810, preventing fatigue failure at the probe-to-cable junction — a common failure mode in high-cycle turbine installations.

Matched System Calibration: Each 330104-15-23-50-02-00 probe is factory-calibrated as a matched set with its designated proximitor. The calibration data is encoded in the connector assembly, allowing the 3500 rack to apply the correct scale factor and gap voltage thresholds automatically. This eliminates field calibration errors that can introduce ±5–10% measurement uncertainty when unmatched components are substituted.

System Integration Benefits

• Deterministic real-time response: The analog output from the proximitor is available within microseconds of gap change, providing sub-millisecond latency to the 3500 rack’s hardware comparators — independent of DCS or PLC scan cycle jitter.
• Direct API 670 compliance: The 3300 XL system meets API Standard 670 (5th Edition) for machinery protection systems, satisfying EPC contractor and insurance requirements without additional field validation.
• Dual-probe redundancy support: X–Y probe pairs feed independent input channels on the 3500 rack, enabling vector-sum vibration calculation and orbit plot generation for bearing condition diagnostics without additional hardware.
• Seamless 3500 rack integration: The probe connects directly to Bently Nevada 3500/42M, 3500/44M, and 3500/46M monitor modules via standard coaxial cabling, with no signal conditioning adapters required.
• Diagnostic transparency: The proximitor’s DC output voltage serves as a direct indicator of probe-to-shaft gap, allowing maintenance personnel to verify correct installation gap (nominally 25 mil) with a standard voltmeter before commissioning.
• Wide bandwidth for transient capture: The DC–10,000 Hz frequency response captures blade-pass frequencies, gear mesh frequencies, and rub events that narrower-band sensors would attenuate, improving root-cause analysis resolution.
• Interchangeability within 3300 XL family: The 330104 probe body is dimensionally and electrically compatible with other 3300 XL probes of the same tip diameter, simplifying spare parts inventory management across multi-train installations.
• Non-contact measurement eliminates wear: Unlike accelerometers mounted on bearing housings, the proximity probe measures shaft motion directly with zero mechanical contact, removing sensor wear as a maintenance variable and extending calibration intervals to 24–36 months in clean environments.
• Hazardous area certification: The 3300 XL system carries ATEX and IECEx certifications for Zone 1/Zone 2 installations, enabling deployment in gas turbine enclosures and compressor trains without additional intrinsic safety barriers in most configurations.

Quality Assurance & Global Logistics

Every 330104-15-23-50-02-00 unit supplied by siemensplc.com is sourced as genuine Bently Nevada (Baker Hughes) original equipment. Each probe undergoes incoming inspection including dimensional verification of the tip geometry, coil impedance measurement at 1 MHz, and linearity verification across the full 50 mil range against a calibrated AISI 4140 target. Units that do not meet the ±0.5% linearity specification are quarantined and returned to the supply chain — no regrade or relabeling is performed.

Inventory is held at our Xiamen, China facility, positioned for efficient access to major international freight hubs including Xiamen Gaoqi International Airport (XMN) and Xiamen Port. Standard export documentation — commercial invoice, packing list, certificate of origin, and material test reports where available — is prepared within 24 hours of order confirmation. DHL Express, FedEx International Priority, and UPS Worldwide Express services are available for time-critical requirements, with transit times of 3–5 business days to most destinations in Europe, North America, Southeast Asia, and the Middle East. Sea freight consolidation is available for bulk orders exceeding 50 units.

All shipments are packed in anti-static foam-lined cartons with individual probe tip protection caps installed. Export classification is confirmed prior to shipment to ensure compliance with applicable export control regulations. A 12-month warranty covering manufacturing defects and calibration drift beyond published specifications is provided with each unit, with advance replacement available for critical plant shutdowns subject to prior arrangement.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
© 2026 siemensplc.com. All rights reserved.

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