Bently Nevada 102044-00-18-10-02 Proximity Transducer – 3300 XL Series

Bently Nevada 102044-00-18-10-02: Eddy-Current Proximity Transducer Assembly for 3300 XL Machinery Protection Systems

The 102044-00-18-10-02 is a factory-configured eddy-current proximity transducer assembly within Bently Nevada’s 3300 XL platform — a measurement system that has established the reference standard for non-contact shaft displacement sensing in API 670-governed rotating machinery protection. This assembly integrates a calibrated 8 mm probe tip, an 18-inch armored probe cable, and a 10-foot extension cable into a single matched set, eliminating the field-calibration variables that arise when components are sourced independently. The result is a drop-in sensing channel with traceable sensitivity of 7.87 V/mm (200 mV/mil) and a DC-to-10 kHz frequency response that captures both static shaft position and high-frequency rotor dynamic events within a single measurement path.

In a control loop context, this transducer occupies the most upstream position in the protection chain: it converts mechanical shaft displacement into a proportional DC voltage before any signal conditioning, alarm logic, or trip relay acts on the data. The accuracy and repeatability of that conversion determine the margin between a valid alarm and a spurious trip — or worse, a missed event. The 102044-00-18-10-02 addresses this by delivering a factory-matched probe-cable-driver system where sensitivity deviation across the linear range is held within ±0.5% of nominal, a tolerance that generic aftermarket assemblies rarely achieve without individual calibration.

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Technical Parameters

Hardware Logical Analysis

The operating principle of the 102044-00-18-10-02 is grounded in Faraday induction: the probe coil, driven by a high-frequency oscillator (typically 1 MHz carrier within the 3300 XL driver), generates an alternating electromagnetic field that penetrates the conductive target surface. As the air gap between probe tip and shaft changes, eddy currents induced in the target alter the coil’s effective impedance. The driver demodulates this impedance shift into a DC output voltage linearly proportional to gap distance — a conversion that is inherently immune to shaft surface contamination by oil film, since the eddy-current field penetrates the fluid layer without attenuation at the operating frequency.

EMC Architecture: The coaxial cable construction — with a continuous braided shield bonded to the driver chassis ground — provides greater than 60 dB of common-mode rejection against conducted interference. In VFD-dense environments where switching frequencies from 2 kHz to 20 kHz are present on cable trays, this shielding architecture prevents noise coupling that would otherwise appear as false vibration amplitude on the monitor channel. The probe body itself is constructed from 316 stainless steel with a PEEK (polyether ether ketone) tip insert, which provides both chemical resistance in hydrocarbon atmospheres and dimensional stability across the full –35°C to +177°C operating envelope.

Factory Matching and Calibration Logic: Each 102044-00-18-10-02 assembly is calibrated as a three-component system — probe, extension cable, and driver — against a NIST-traceable displacement standard. The calibration accounts for the distributed capacitance and inductance of the specific cable lengths encoded in the part number suffix (-18-10-), which directly affect the resonant frequency of the probe-cable network. Substituting a cable of different length without recalibration shifts the sensitivity curve by a predictable but non-trivial amount (typically 2–5% per meter of cable deviation), which is why the part number encodes cable geometry as a configuration parameter rather than a field-selectable option.

Redundancy Arbitration Compatibility: In dual-voting or 2oo3 (two-out-of-three) protection architectures, each measurement channel requires independent probe assemblies on separate bearing planes. The 102044-00-18-10-02 is designed with electrically isolated probe bodies to prevent ground loop formation between parallel channels — a critical requirement when channels feed separate monitor cards that share a common DCS backplane ground reference.

System Integration Benefits

• Zero-Wear Sensing: Non-contact measurement eliminates probe degradation from shaft contact, supporting continuous 8,760-hour annual operation without scheduled sensor replacement intervals.
• Dual-Parameter Channel: A single probe channel simultaneously delivers static gap (shaft centerline position, eccentricity ratio) and dynamic vibration amplitude — two independent protection parameters from one cable run, reducing panel wiring density.
• Deterministic Signal Latency: The analog DC output from the driver reaches the monitor input within microseconds of shaft displacement, with no digital conversion latency in the sensing path. This preserves the sub-millisecond trip response time required by API 670 for overspeed and high-vibration protection.
• Direct 3300 XL Monitor Compatibility: The assembly is electrically and mechanically matched to the full 3300 XL monitor family (3300/16, 3300/20, 3300/25, 3300/55), requiring no impedance matching networks or signal conditioning adapters at the monitor input terminals.
• Diagnostic Transparency via Gap Voltage: The –2 to –18 VDC output provides a continuous, readable gap voltage that maintenance engineers can measure with a standard DVM at the driver output terminals, enabling rapid field verification of probe installation gap without removing the machine from service.
• High-Temperature Bearing Pedestal Deployment: The +177°C probe rating covers hot-section steam turbine bearing pedestals where ambient temperatures routinely exceed the limits of standard industrial sensors, eliminating the need for thermal standoffs or cooling provisions.
• Material Correction Factor Documentation: For non-standard shaft alloys (austenitic stainless, Inconel, titanium), Bently Nevada publishes material correction factors that allow the 102044-00-18-10-02 to be recalibrated in-situ using the driver’s span adjustment, extending applicability beyond carbon steel rotors without hardware substitution.
• Integration with Historian and DCS: The 3300 XL monitor downstream of this probe outputs 4–20 mA analog signals and supports Modbus/PROFIBUS communication, enabling vibration trend data to be archived in OSIsoft PI, Emerson DeltaV, or Siemens PCS 7 historians with no additional signal conversion hardware.

Quality Assurance & Global Logistics

Every 102044-00-18-10-02 unit supplied through siemensplc.com is sourced from verified industrial distribution channels with documented supply chain traceability back to the Bently Nevada (Baker Hughes) manufacturing facility. Units are inspected prior to dispatch against the following acceptance criteria: probe tip dimensional check (±0.05 mm), coaxial cable continuity and insulation resistance (>100 MΩ at 500 VDC), connector contact integrity, and impedance verification at 1 MHz carrier frequency. Certificates of Conformance (CoC) and, where available, original manufacturer test reports are provided upon request at no additional charge.

Shipments originate from our Xiamen, China operations center, positioned within the Xiamen Free Trade Zone for streamlined customs clearance on export documentation. Standard international dispatch is via DHL Express or FedEx International Priority, with typical transit times of 3–5 business days to Europe, North America, and Southeast Asia. For project-critical requirements, same-day dispatch is available on confirmed in-stock units when orders are placed before 14:00 CST. All units are packed in anti-static foam-lined enclosures with moisture barrier film and clearly labeled with part number, serial number, and country of origin for customs compliance. Commercial invoices, packing lists, and HS code documentation (HS 9031.80) are included with every shipment.

Contact Information

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