Bently Nevada 330104-00-13-10-01-CN Proximity Probe – 3300 XL Series

Bently Nevada 330104-00-13-10-01-CN: 8 mm Eddy-Current Proximity Probe for Critical Machinery Protection

The Bently Nevada 330104-00-13-10-01-CN is an 8 mm eddy-current proximity probe belonging to the 3300 XL series — a platform engineered specifically for continuous, non-contact measurement of shaft radial vibration, axial position, and eccentricity in high-speed rotating machinery. Within a machinery protection loop, this probe functions as the primary transducer: it converts the physical gap between its tip and the target shaft surface into a proportional DC voltage signal, which is then conditioned by a paired proximitor and processed by a 3300 or 3500 series monitor. The accuracy and stability of this conversion directly determines the quality of every downstream alarm, trip, and diagnostic decision in the control system.

The probe operates on the eddy-current principle. A high-frequency oscillator within the proximitor drives a coil embedded in the probe tip, generating an electromagnetic field. When a conductive target enters this field, eddy currents are induced on the shaft surface, loading the oscillator and reducing its amplitude. The proximitor demodulates this amplitude change into a linear DC output — nominally 200 mV/mil (7.87 V/mm) — across a calibrated measurement range of 0 to 90 mil (0 to 2.29 mm). This signal path is entirely passive at the probe end, which means the probe itself contains no active electronics and is inherently robust against temperature drift and electrical transients.

The CN suffix designates the Chinese-standard connector variant, optimized for domestic industrial installations and compatible with the CN-series extension cables and proximitors deployed across Chinese power generation, petrochemical, and manufacturing facilities. The 13-inch (330 mm) integral cable length is the standard short-body configuration, intended for installations where the proximitor is mounted close to the machine casing.

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Technical Parameters

Hardware Logical Analysis

The 330104-00-13-10-01-CN is designed around a coaxial coil-and-shield architecture that provides three distinct hardware advantages over generic eddy-current sensors.

Electromagnetic Compatibility (EMC) and Field Confinement: The probe tip incorporates a ferrite-loaded housing that confines the electromagnetic field to a tightly defined sensing cone. This geometry minimizes cross-talk from adjacent probes in multi-probe installations (e.g., X-Y radial probe pairs at 90°) and reduces susceptibility to external RF interference from variable-frequency drives, arc welders, and high-current bus bars common in industrial environments. The coaxial cable construction maintains a controlled characteristic impedance from tip to proximitor, preventing signal reflections that would introduce measurement error at high oscillator frequencies (typically 1–2 MHz).

Thermal Stability of Scale Factor: The coil winding material and ferrite core are selected for matched thermal coefficients of expansion. Over the operating range of −35 °C to +121 °C, scale factor drift is held within ±1% — a critical requirement for machinery where bearing clearances are measured in single-digit mils and a 2% scale error translates directly into a false alarm or a missed trip threshold.

Intrinsic Safety Architecture: The FM/CSA intrinsic safety certification is achieved through the proximitor’s barrier circuit, not through active components in the probe. The probe itself is a passive inductive element with no stored energy above the ignition threshold for Group IIC gases. This architecture allows the probe to be installed in Zone 0/Division 1 hazardous areas without additional conduit sealing or explosion-proof enclosures at the probe end, reducing installation cost and maintenance complexity.

Connector and Cable Integrity: The CN connector uses a gold-plated center pin and a stainless-steel locking collar, providing <5 mΩ contact resistance and resistance to vibration-induced loosening. The integral cable is constructed with a fluoropolymer (PTFE) dielectric, which maintains stable capacitance per unit length across the full temperature range — a parameter that directly affects the proximitor’s oscillator tuning and, therefore, the system’s calibrated scale factor.

System Integration Benefits

• Deterministic signal latency: The passive probe-to-proximitor signal path introduces no digital processing delay. The DC output tracks shaft position changes at the full bandwidth of the proximitor (typically DC to 10 kHz), ensuring that sub-synchronous instabilities and rub events are captured without aliasing.
• API 670 compliance out of the box: The 3300 XL probe meets the transducer performance requirements of API 670 (5th edition) for radial vibration and axial position measurement, eliminating the need for additional qualification testing during plant commissioning.
• Plug-and-play calibration traceability: Each probe is factory-calibrated against AISI 4140 steel and ships with a calibration certificate. The scale factor is stamped on the probe body, allowing field technicians to verify system gain without re-running a full calibration sweep.
• Diagnostic transparency via gap voltage: The DC bias voltage at the proximitor output (nominally −10 VDC at mid-gap) provides a continuous, real-time indicator of probe-to-shaft gap. Operators can trend this value to detect probe wear, shaft centerline migration, and bearing wear without interrupting production.
• Seamless integration with System 1 software: When connected to a 3500 series monitor running Baker Hughes System 1 Evolution, the probe’s gap and dynamic signals are automatically tagged and historized, enabling waveform analysis, orbit plots, and cascade diagrams without additional signal conditioning hardware.
• Redundancy-ready architecture: The probe’s standardized M10 × 1.0 thread and fixed cable length allow hot-standby redundant probe installations in dual-probe brackets, supporting 1oo2 voting logic in safety instrumented systems (SIS) without custom mechanical adapters.
• Minimal maintenance footprint: With no active electronics in the probe body, mean time between failures (MTBF) is dominated by connector and cable integrity rather than component aging. Scheduled maintenance is limited to gap verification and connector inspection — tasks executable during normal operation windows.
• Cross-compatibility with 3500 platform: The probe operates identically with 3500/42M proximity monitor cards, allowing facilities to standardize on a single probe SKU across both 3300 and 3500 monitoring architectures, reducing spare parts inventory and procurement complexity.

Quality Assurance & Global Logistics

Every unit of the 330104-00-13-10-01-CN supplied by siemensplc.com is sourced as genuine Bently Nevada OEM hardware. Prior to dispatch, each probe undergoes a three-stage inspection protocol: visual examination of the probe tip, cable jacket, and connector for mechanical damage; continuity and insulation resistance verification of the coaxial cable; and connector contact resistance measurement to confirm <5 mΩ per pin. Units that do not pass all three stages are quarantined and not shipped.

Original OEM packaging is preserved wherever available. Where secondary packaging is used, probes are individually wrapped in anti-static foam and sealed in moisture-barrier bags with desiccant, conforming to IPC/JEDEC J-STD-033 handling guidelines for sensitive electronic components.

Calibration certificates and OEM documentation are available upon request. Serial numbers are cross-referenced against Bently Nevada production records where traceability data is accessible, providing an additional layer of anti-counterfeit assurance.

Logistics operations are based in Xiamen, China — a major southeastern port city with direct air freight connections to Singapore, Dubai, Frankfurt, Los Angeles, and Tokyo. Standard export documentation (commercial invoice, packing list, certificate of origin) is prepared for every shipment. DDP (Delivered Duty Paid) terms are available for qualified buyers in the EU, UK, and Southeast Asia. In-stock orders are dispatched within 1–3 business days. Express air freight (DHL, FedEx, UPS) delivers to most destinations within 3–7 business days from Xiamen.

Contact Information

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