Bently Nevada 330104-00-15-05-01-00 Proximity Transducer – 3300 XL Series

Bently Nevada 330104-00-15-05-01-00 — Eddy-Current Proximity Transducer in the 3300 XL System Architecture

The 330104-00-15-05-01-00 is a standard-configuration eddy-current proximity transducer within Bently Nevada’s 3300 XL Proximity Transducer System. It operates on the principle of electromagnetic induction: a high-frequency oscillating current (typically 1.0 MHz) is driven through the probe coil, generating an alternating magnetic field at the probe tip. When a conductive target — typically a shaft or thrust collar machined to API 670 surface finish requirements — enters this field, eddy currents are induced in the target surface. The resulting energy absorption causes a measurable change in the probe’s impedance, which the Proximitor® sensor converts into a DC voltage output proportional to the gap distance between probe tip and target.

This transducer is factory-configured with a 15 mm probe length and a 5 m armored extension cable, terminating at the Proximitor® sensor input. The -01-00 suffix designates a standard temperature range and non-intrinsically-safe configuration, making it appropriate for general industrial environments where ATEX/IECEx zoning is not a primary constraint. The system is calibrated against AISI 4140 steel targets at the factory, with a documented sensitivity of 7.87 V/mm (200 mV/mil) across the linear range of 0.25 mm to 2.25 mm gap.

In a complete 3300 XL measurement chain, this probe pairs with the 330130-series extension cable and the 330180-series Proximitor® sensor. The Proximitor® provides the oscillator drive, demodulation, and buffered output signal. The resulting ±24 VDC-powered signal chain feeds directly into Bently Nevada 3500-series monitoring racks — specifically the 3500/42 Proximitor®/Seismic Monitor — where the signal is processed for radial vibration, axial position, or differential expansion measurements depending on channel configuration.

The 330104-00-15-05-01-00 is a direct, pin-compatible replacement for earlier 3300 series probes in existing installations. No recalibration of the Proximitor® sensor is required when replacing a probe of identical part number, provided the gap is re-established within the linear range during reinstallation. This characteristic significantly reduces planned maintenance downtime on critical rotating assets such as steam turbines, gas compressors, and boiler feed pumps.

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Technical Parameters

Hardware Logical Analysis

The 3300 XL probe design addresses three principal engineering challenges inherent to high-frequency eddy-current measurement in industrial environments: thermal drift, electromagnetic interference, and mechanical ingress.

Thermal Compensation Architecture: The probe coil is wound on a ceramic bobbin with a controlled thermal expansion coefficient. The coil wire is a nickel-iron alloy selected for its low temperature coefficient of resistance. This combination limits scale factor drift to less than ±0.5% across the full −35 °C to +177 °C operating range — a critical requirement for steam turbine bearing housings where ambient temperatures can vary by 120 °C between cold startup and full-load operation.

EMC Shielding Strategy: The probe body is machined from 316 stainless steel, which provides both mechanical protection and a Faraday shield against radiated RF interference. The coaxial cable construction maintains a continuous shield from probe tip to Proximitor® input, with shield continuity verified at the factory. This architecture achieves a common-mode rejection ratio sufficient to suppress 50/60 Hz power-frequency interference by more than 60 dB, preventing false vibration readings in environments with high-current motor drives or transformer proximity.

Coaxial Cable Impedance Matching: The extension cable is manufactured to a controlled characteristic impedance of 50 Ω. Impedance discontinuities in the cable — caused by mechanical damage, moisture ingress, or improper splicing — produce reflections that shift the Proximitor® oscillator frequency and introduce a systematic gap error. The 330104-00-15-05-01-00 uses a factory-matched cable-probe pair, eliminating the impedance mismatch errors that arise when field-assembled cables are substituted.

Probe Tip Geometry and Gap Linearity: The 8 mm tip diameter is optimized for the 0.25 mm – 2.25 mm linear range. Reducing tip diameter below this value increases sensitivity but narrows the linear range and increases susceptibility to target surface finish variation. The 330104 geometry represents the engineering balance point for general-purpose shaft monitoring per API 670 Table 1 requirements, where a minimum linear range of 1.5 mm is mandated for radial vibration channels.

Connector Reliability: The integral coaxial connector uses a gold-plated center pin and a stainless-steel outer shell with a locking thread. Contact resistance is specified at less than 5 mΩ, and the connector is rated for 500 mating cycles. In practice, this connector is mated once during installation and remains undisturbed for the life of the probe — typically 5 to 10 years in continuous service on critical machinery.

System Integration Benefits

• Direct API 670 Compliance: The 330104-00-15-05-01-00 is designed and documented to meet API Standard 670 (5th Edition) requirements for non-contacting vibration transducer systems, eliminating the need for additional engineering justification when specifying the system for new machinery trains in oil & gas or petrochemical facilities.
• Zero-Reconfiguration Replacement: Replacing a failed probe with an identical part number requires only mechanical reinstallation and gap adjustment. The Proximitor® sensor retains its calibration, and no rack-level parameter changes are needed — reducing mean time to repair (MTTR) on critical assets to under 2 hours in most installations.
• Deterministic Signal Latency: The analog output of the 3300 XL system has a signal propagation delay of less than 100 µs from physical gap change to Proximitor® output. This latency is deterministic and independent of network load, making the system suitable for machinery protection applications where trip response time is a contractual requirement.
• Diagnostic Transparency via Buffered Output: The Proximitor® sensor provides a buffered, unfiltered output (BNC connector) that allows simultaneous connection of a portable data collector without interrupting the protection channel. This enables spectrum analysis and waveform capture during normal operation, supporting condition monitoring programs without process interruption.
• Multi-Parameter Measurement from a Single Probe: A single 330104-series probe installation can simultaneously provide radial vibration (AC component), shaft centerline position (DC component), and slow-roll runout data to the 3500 rack. This eliminates the need for separate sensor installations for each measurement parameter, reducing penetration count on bearing housings.
• Compatibility with Bently Nevada System 1 Software: The analog output of the 3300 XL system is fully compatible with Bently Nevada System 1 condition monitoring software via the 3500 rack’s Ethernet gateway. Historical trend data, alarm setpoints, and waveform archives are managed centrally, providing a unified diagnostic view across all monitored machinery trains.
• Scalable Redundancy Architecture: For critical machinery where continuous monitoring is mandatory, two 330104-series probes can be installed at 90° separation on the same bearing journal. The 3500/42 monitor supports dual-probe input with selectable voting logic (1-of-2 or 2-of-2), providing protection against both probe failure and false trips — a requirement for API 670 Category I machinery.
• Long-Term Spare Parts Availability: Bently Nevada maintains backward compatibility across 3300 XL series components. The 330104-00-15-05-01-00 is interchangeable with probes installed in systems commissioned over the past two decades, protecting the capital investment in existing monitoring infrastructure and simplifying spare parts inventory management.

Quality Assurance & Global Logistics

Every 330104-00-15-05-01-00 unit dispatched from our Xiamen facility is a genuine Bently Nevada (Baker Hughes) component sourced through verified supply channels. Units are stored in climate-controlled conditions (15 °C – 25 °C, RH < 60%) to preserve connector integrity and cable jacket flexibility. Prior to shipment, each unit undergoes a physical inspection covering label authenticity, connector condition, cable jacket continuity, and probe tip integrity. Inspection records are retained for 24 months.

Shipments originate from Xiamen, China, with access to Xiamen Gaoqi International Airport (XMN) and Xiamen Port for both air and sea freight. Standard export documentation — commercial invoice, packing list, certificate of origin (Form E for ASEAN, EUR.1 for EU), and packing declaration — is prepared for every international order. DHL Express and FedEx International Priority are the primary carriers for single-unit and small-quantity orders, with typical transit times of 3–5 business days to Europe, North America, and Southeast Asia. For project quantities exceeding 10 units, sea freight consolidation via Xiamen Port is available with lead times of 18–25 days to major global ports.

All units are shipped in anti-static, moisture-barrier packaging with foam cushioning. The probe tip is protected by a machined plastic cap. A printed packing checklist is included in each box. Export control classification: EAR99 (no export license required for most destinations). Buyers in sanctioned jurisdictions should confirm eligibility prior to ordering.

A 12-month warranty from the date of shipment covers manufacturing defects and functional failures under normal operating conditions. Warranty claims are processed within 5 business days of receipt of the returned unit. Replacement units are dispatched by express courier at no additional charge for confirmed warranty cases.

Contact Information

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