Bently Nevada 330104-00-05-50-02-00 Proximity Sensor – 3300 XL Series

Bently Nevada 330104-00-05-50-02-00 — 8mm Eddy-Current Proximity Probe in the 3300 XL Transducer System

The 330104-00-05-50-02-00 is a non-contact eddy-current proximity probe manufactured by Bently Nevada (a Baker Hughes company) as part of the 3300 XL 8mm Proximity Transducer System. It performs continuous, real-time measurement of shaft radial vibration, axial position displacement, and differential expansion on fluid-film bearing rotating machinery. The probe operates on the principle of electromagnetic induction: a high-frequency oscillator within the paired Proximitor driver energizes a coil wound at the probe tip, generating an alternating magnetic field. When a conductive target (typically AISI 4140 steel shaft) enters this field, eddy currents are induced on the target surface, loading the oscillator circuit. The driver demodulates this load variation into a DC voltage output linearly proportional to the gap distance between probe tip and shaft surface.

This measurement architecture delivers sub-micron resolution without mechanical contact, making it the standard transducer technology for API 670-compliant machinery protection systems in steam turbines, gas turbines, centrifugal compressors, and large pump trains. The 330104-00-05-50-02-00 integrates directly with Bently Nevada 3500 series monitor racks and 3300/16 monitor cards, requiring no signal conditioning adaptation when replacing within the same 3300 XL system family.

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

Technical Parameters

Hardware Logical Analysis

The 330104-00-05-50-02-00 probe tip houses a precision-wound sensing coil embedded in a thermoplastic-filled stainless steel housing. The coil geometry is matched at the factory to the 3300 XL Proximitor driver oscillator frequency (typically 1.0 MHz ± 5%), ensuring the probe-driver pair operates within the calibrated linear region of the eddy-current transfer curve. This factory-matched pairing is the primary reason the 3300 XL system achieves its ±0.5% scale factor accuracy across the full linear range — a tolerance that generic proximity probes cannot replicate without individual recalibration.

EMC and Shielding Architecture: The integral 5m cable uses a triaxial construction: the inner conductor carries the oscillator signal, the inner shield is driven at the same potential as the center conductor (guard drive), and the outer shield provides ground reference. This driven-guard topology eliminates cable capacitance loading on the oscillator circuit, preserving frequency response flatness to 10 kHz even at full 10m system cable length. The stainless steel armor over the outer jacket provides mechanical protection and additional RF shielding, attenuating external electromagnetic interference from variable-frequency drives, high-current bus bars, and RF transmitters common in industrial plant environments.

Thermal Stability: The probe body is rated to +177°C, achieved through the selection of high-temperature thermoplastic compounds for the coil potting and a stainless steel housing with low thermal expansion coefficient. The scale factor temperature coefficient is specified at less than ±0.05% per °C across the operating range, meaning a 100°C ambient temperature swing introduces less than 5 mV/mm scale factor drift — negligible for machinery protection alarm setpoints typically set at ±25 µm resolution.

Target Material Sensitivity: The eddy-current field penetration depth is a function of target material conductivity and permeability. The 330104 series is factory-calibrated for AISI 4140 steel (relative permeability µr ≈ 100, conductivity σ ≈ 4.5 MS/m). For non-standard shaft materials such as Inconel 718 or titanium alloys, the effective scale factor shifts by 5–15%, requiring a material correction factor or field recalibration against a known gap standard. This is a system-level consideration, not a deficiency of the probe hardware.

Redundancy and Voting Logic Compatibility: In API 670 installations, the 330104-00-05-50-02-00 is typically deployed in dual or triple redundant configurations per bearing measurement plane. The 3500 series monitor rack supports 2oo3 (two-out-of-three) voting logic for trip decisions, requiring three independent probe-driver-monitor channels per measurement point. The probe’s consistent scale factor across units (factory-matched) ensures that voting logic thresholds remain valid without per-channel offset correction.

System Integration Benefits

• Direct API 670 Compliance: Factory calibration to the 3300 XL scale factor (7.87 V/mm) allows drop-in replacement in existing API 670 protection systems without recalibration of monitor alarm and trip setpoints.
• Deterministic Frequency Response: DC–10,000 Hz bandwidth covers all relevant rotating machinery vibration frequencies, including sub-synchronous instability (oil whirl at 0.43–0.48×), synchronous (1×), and higher harmonics up to 10× for machines running at 600 RPM–60,000 RPM.
• Zero Mechanical Wear: Non-contact measurement eliminates sensor degradation from shaft contact, supporting continuous 24/7 operation in critical machinery protection loops with multi-year service intervals.
• Modular System Architecture: Probe, extension cable, and Proximitor driver are independently replaceable. A failed probe can be swapped without disturbing the extension cable routing or driver wiring, reducing mean time to repair (MTTR) in live plant environments.
• Diagnostic Transparency: The –2 VDC to –18 VDC output range provides a measurable signal at both ends of travel. A driver output at –2 VDC indicates probe-to-shaft gap below 0.25 mm (contact risk); –18 VDC indicates gap above 2.26 mm (probe loss or shaft loss). Both conditions are distinguishable from normal operation, enabling monitor cards to generate Not-OK (NOK) alerts for sensor fault discrimination.
• 3500 Series Monitor Rack Compatibility: The 330104-00-05-50-02-00 output is directly compatible with Bently Nevada 3500/42M, 3500/40M, and 3500/45 monitor cards. No signal conditioning adapter is required when the Proximitor driver output is within the –24V supply specification.
• ATEX/IECEx Certification: Certified for use in Zone 1 and Zone 2 hazardous areas, enabling installation in petrochemical and LNG plant environments where flammable gas atmospheres may be present during normal or abnormal operation.
• Traceable Calibration Documentation: Each unit ships with NIST-traceable factory calibration data, supporting plant QA documentation, insurance audits, and regulatory compliance records for critical machinery protection systems.

Quality Assurance & Global Logistics

Every 330104-00-05-50-02-00 unit supplied through siemensplc.com is genuine Bently Nevada manufacture, sourced through verified supply channels with documented chain of custody. Prior to dispatch from our Xiamen, China facility, each unit undergoes a structured pre-shipment inspection protocol:

• Visual inspection of probe tip, cable armor, and connector for physical integrity
• Coaxial cable continuity and insulation resistance verification
• Original manufacturer labeling and part number confirmation
• Packaging integrity check to prevent transit damage

Shipments originate from Xiamen, China, with access to major international freight carriers including DHL Express, FedEx International Priority, and UPS Worldwide Expedited. Standard export documentation — commercial invoice, packing list, and HS code classification — is prepared for all cross-border orders to support customs clearance in the destination country. In-stock units typically ship within 1–3 business days. For urgent AOG (aircraft-on-ground equivalent) plant shutdown scenarios, same-day dispatch is available upon confirmed payment before 14:00 CST. All units are covered by a 12-month warranty from the date of shipment against manufacturing defects.

Contact Information

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