Bently Nevada 330104-00-06-10-01-CN Proximity Probe – 3300 XL Series

330104-00-06-10-01-CN: Eddy-Current Proximity Probe for Continuous Shaft Displacement Monitoring

The Bently Nevada 330104-00-06-10-01-CN is a 5 mm tip, metric-body proximity probe belonging to the 3300 XL 8 mm Proximity Transducer System. Its primary function within a machinery protection loop is to convert rotor-to-stator air-gap changes into a proportional DC voltage signal, delivering a continuous, non-contact measurement of radial shaft vibration, axial position, and differential expansion. Unlike accelerometers that integrate twice to estimate displacement, this eddy-current transducer outputs displacement directly — eliminating phase error accumulation and low-frequency drift that degrade alarm reliability in slow-speed machinery.

In a typical API 670-compliant protection architecture, the probe is wired through a 3300 XL extension cable to a Proximitor® sensor (e.g., 330180-X1-CN), which supplies the –24 VDC oscillator bias and conditions the output to the –1 VDC to –21 VDC range consumed by 3500-series monitor cards. The CN connector variant is factory-terminated to Chinese market wiring conventions, reducing field-wiring errors during commissioning on domestically manufactured turbomachinery.

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

Technical Parameters

Hardware Logical Analysis

The 330104-00-06-10-01-CN operates on the eddy-current induction principle. The Proximitor® sensor drives a high-frequency oscillator (nominally 1.0 MHz) through the coaxial cable to the probe tip coil. When a conductive target enters the electromagnetic field, eddy currents are induced on the target surface, loading the oscillator and reducing its amplitude. The Proximitor® demodulates this amplitude change into a DC voltage proportional to gap distance at a scale factor of 7.87 V/mm.

EMC Design: The armored integral cable provides a continuous Faraday shield from probe body to Proximitor® input, suppressing capacitively coupled interference from adjacent VFD cables and high-voltage bus bars — a common noise source in compressor trains. The 316 stainless steel housing is non-magnetic, preventing permeability-induced scale-factor shift that occurs with carbon-steel housings in high-flux environments near motor end-bells.

Thermal Stability: The coil former and potting compound are selected for matched thermal expansion coefficients, maintaining scale-factor drift below ±0.5% across the full –35 °C to +177 °C operating envelope. This is critical for steam-turbine pedestal installations where bearing housing temperatures can exceed 150 °C during load transients.

Target Material Compensation: The 4140 steel calibration baseline is documented in the Bently Nevada calibration certificate. For austenitic stainless (316L) or titanium shafts, the effective sensing range contracts and the scale factor shifts by up to –15%; the CN variant ships with a material derating table enabling field engineers to recalculate alarm setpoints without returning the probe for recalibration.

Connector Integrity: The CN connector uses a captive-nut locking mechanism rated for 500 mating cycles, with gold-plated contacts to prevent oxidation-induced contact resistance in humid tropical environments common to coastal Chinese industrial facilities.

System Integration Benefits

• Direct 3300 XL driver compatibility: Mates with 330180-X1-CN and 330130-series Proximitor® sensors without impedance matching networks, preserving factory-calibrated scale factor across the full cable run.
• Deterministic DC output: The –1 V to –21 V analog output is consumed directly by 3500/40M and 3500/42M monitor cards, enabling sub-millisecond alarm response latency with no A/D conversion delay in the field wiring segment.
• API 670 dual-probe redundancy: The 5 mm metric body fits standard dual-probe holders (X–Y orientation, 90° apart), supporting full API 670 Section 5.3 radial vibration redundancy without custom machining of the bearing housing bracket.
• Diagnostic transparency via gap voltage: The DC bias voltage at the Proximitor® output provides a continuous static gap reading, allowing maintenance engineers to detect probe fouling, shaft bow, and bracket looseness between scheduled outages — without interrupting production.
• Hazardous area deployment: ATEX and IECEx certification allows installation in Zone 1 and Zone 2 classified areas when paired with a certified Proximitor® sensor and appropriate Zener barriers or galvanic isolators, covering the majority of offshore and petrochemical applications.
• Wide frequency bandwidth: The DC – 10,000 Hz (–3 dB) response captures both synchronous (1×) and sub-synchronous (oil-whirl, surge precursor) vibration components simultaneously, eliminating the need for separate high-frequency accelerometers on most compressor frames.
• Minimal installation footprint: The 5 mm tip diameter and metric thread body reduce the required boss diameter on bearing housings compared to 8 mm probes, enabling retrofit on legacy machinery with limited housing wall thickness.
• Long-term signal stability: Eddy-current technology has no moving parts, no piezoelectric crystal fatigue, and no charge amplifier drift — mean time between calibration intervals typically exceeds 48 months in clean industrial environments per API 670 Annex D guidance.

Quality Assurance & Global Logistics

Each 330104-00-06-10-01-CN unit stocked at siemensplc.com is sourced through verified Bently Nevada / Baker Hughes authorized distribution channels. Prior to dispatch, every probe undergoes incoming inspection against OEM datasheet tolerances: scale factor verification at nominal gap, insulation resistance check on the integral cable, and visual inspection of the CN connector locking mechanism. Units are shipped in original manufacturer packaging with the factory calibration certificate and lot traceability documentation.

Orders are fulfilled from our Xiamen, China warehouse. Domestic China delivery is typically 2–3 business days via SF Express or JD Logistics. International shipments to Southeast Asia, the Middle East, and Europe are dispatched via DHL Express or FedEx International Priority, with transit times of 3–7 business days depending on destination customs clearance. Full export documentation — commercial invoice, packing list, and certificate of origin — is prepared for every international order. Expedited air-freight consolidation is available for urgent plant-shutdown requirements; specify your required delivery date when submitting your RFQ.

All units are covered by a 12-month warranty against manufacturing defects from the date of shipment. Warranty claims are processed with replacement dispatch within 5 business days upon receipt of the defective unit and inspection confirmation.

Contact Information

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