Bently Nevada 330104-01-14-10-01-05 Proximity Probe – 3300 XL Series

Bently Nevada 330104-01-14-10-01-05 — 8 mm Eddy-Current Proximity Probe in the 3300 XL Transducer System

The 330104-01-14-10-01-05 is an 8 mm eddy-current proximity probe manufactured by Bently Nevada (a Baker Hughes company) and qualified for continuous, non-contact measurement of radial shaft vibration, axial position, and differential expansion in rotating machinery. It operates as the field-sensing element within the 3300 XL Proximity Transducer System — a three-component signal chain comprising the probe, an extension cable (330130 series), and a Proximitor sensor (330180/330181 series). The probe converts the gap between its tip and a conductive target surface into a proportional DC voltage at a sensitivity of 7.87 V/mm (200 mV/mil), which the Proximitor conditions and transmits to a 3300 XL monitor card for real-time machinery protection decisions.

The metric M10 × 1 thread body and 1.0 m integral coaxial cable of this specific configuration make it the preferred drop-in replacement for metric-mount installations on European and Asian turbomachinery frames, where imperial-thread probes are mechanically incompatible. The probe tip diameter of 8 mm defines the eddy-current field geometry and sets the linear measurement range at 0.25 mm to 2.54 mm (10 to 100 mil) — a window that covers the full dynamic excursion of most journal-bearing rotor systems operating under API 670 machinery protection requirements.

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

Technical Parameters

Hardware Logical Analysis

The 330104-01-14-10-01-05 operates on the eddy-current (inductive) sensing principle. An oscillator circuit within the Proximitor sensor drives a high-frequency AC current — nominally 1.0 MHz — through the probe’s internal coil. When the coil approaches a conductive target, the alternating magnetic field induces eddy currents on the target surface. These eddy currents generate an opposing magnetic field that loads the oscillator, reducing its amplitude in proportion to the gap distance. The Proximitor demodulates this amplitude-modulated signal and outputs a calibrated DC voltage: at the nominal gap of 1.27 mm (50 mil), the output is approximately −10 VDC; at 0.25 mm (10 mil) it rises toward −2 VDC; at 2.54 mm (100 mil) it falls toward −18 VDC.

EMC and Shielding Architecture: The integral coaxial cable uses a double-braid shield construction terminated at the Proximitor chassis ground. This topology suppresses common-mode noise injection from adjacent VFD cabling and high-current bus bars — a persistent interference source in motor-drive-intensive plant environments. The probe body itself is constructed from 316 stainless steel, which provides both corrosion resistance and a Faraday-cage effect around the coil assembly, attenuating radiated RF interference from nearby transmitters or arc-welding operations.

Thermal Stability: The PEEK (polyether ether ketone) tip material maintains dimensional stability across the full −35 °C to +177 °C operating envelope. PEEK’s low coefficient of thermal expansion (50 × 10⁻⁶ /°C) minimizes tip geometry drift, which would otherwise introduce a temperature-dependent offset error in the gap-to-voltage transfer function. For installations on hot-section gas turbine bearing housings where ambient temperatures routinely exceed 150 °C, this material selection is a deliberate design choice rather than a cost optimization.

Cable Impedance Matching: The 1.0 m integral cable is impedance-matched to the 330130 extension cable series. Mismatched cable lengths or substitution with non-Bently-Nevada cables alter the total system capacitance, shifting the oscillator operating point and degrading sensitivity calibration. The −01-14 suffix in the part number encodes the cable length (1.0 m) and thread configuration, ensuring the complete transducer system is calibrated as a matched set at the factory.

System Integration Benefits

• API 670 5th Edition Compliance: The 3300 XL system, with this probe as the sensing element, meets the full machinery protection standard for radial vibration, axial position, and speed measurement — satisfying insurance and regulatory requirements for critical rotating equipment in oil & gas, power generation, and petrochemical facilities.
• Deterministic Signal Latency: The analog output from the Proximitor to the 3300 XL monitor card has a signal propagation delay below 1 ms, enabling the monitor to execute trip logic within a deterministic 20 ms window — a requirement for protecting machinery with runaway acceleration profiles above 3,000 rpm/s.
• Plug-and-Play Replacement: The M10 × 1 thread and 1.0 m cable geometry are dimensionally identical to all prior 330104-01-14-xx-xx-xx variants, allowing field replacement without re-machining probe bosses or re-routing cable trays.
• Hazardous Area Compatibility: When paired with the 3300 XL Zener Barrier, the system achieves intrinsic safety certification for Zone 1 / Division 1 classified areas, covering hydrogen-rich and hydrocarbon-vapor environments without requiring explosion-proof conduit runs.
• Diagnostic Transparency via OK Circuit: The Proximitor’s built-in OK circuit continuously monitors the probe-cable-Proximitor signal chain. A broken cable, shorted coil, or probe tip impact event drives the OK output low, triggering a system fault alarm in the 3300 XL monitor before a false vibration reading can initiate an unwarranted trip.
• Multi-Channel Monitor Compatibility: The probe output is compatible with all 3300 XL monitor cards — including the 3300/16 Dual Vibration Monitor, 3300/20 Thrust Position Monitor, and 3300/46 Speed Monitor — without signal conditioning adapters, simplifying spare-parts inventory management.
• Long Cable Run Capability: The total system cable length (integral + extension) can reach up to 9.0 m without sensitivity recalibration, enabling probe installation at bearing housings remote from the Proximitor junction box — a practical advantage in large turbine-generator sets where the bearing span exceeds 6 m.
• Reduced Maintenance Interval: Non-contact measurement eliminates mechanical wear on the sensing element. In continuous-duty applications running 8,760 hours per year, the probe’s mean time between replacement (MTBR) exceeds 10 years under normal operating conditions, reducing planned maintenance costs relative to contact-type displacement sensors.

Quality Assurance & Global Logistics

Every 330104-01-14-10-01-05 unit dispatched from our Xiamen, China facility is a factory-original Bently Nevada component procured through documented supply channels. Each unit is inspected against the following acceptance criteria before shipment: label and part-number integrity, housing surface condition, connector pin alignment and contact resistance, and coaxial cable continuity. Batch traceability records and Certificates of Conformance (CoC) are available upon request for orders requiring documentation packages for plant maintenance management systems (CMMS).

Packaging: Units are shipped in anti-static foam-lined boxes with moisture-desiccant inserts and tamper-evident outer seals. The probe tip is protected by a machined plastic cap to prevent coil damage during transit.

Logistics Options from Xiamen:

• Express Air (DHL / FedEx / UPS): 3–7 business days to most global destinations; door-to-door tracking provided.
• Economy Air: 7–14 business days; suitable for non-urgent replenishment orders.
• Sea Freight (LCL/FCL): Available for bulk orders of 20+ units; contact us for freight quotation.
• Export Documentation: Commercial invoice, packing list, CoC, and HS code 9031.80 classification documents provided as standard.
• Customs Assistance: We support export licensing declarations and can provide end-use certificates for regulated industrial components where required by destination customs authorities.

Contact Information

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