Bently Nevada 330104-08-15-10-02-00 Proximity Transducer – 3300 XL Series

Bently Nevada 330104-08-15-10-02-00: 8 mm Eddy-Current Proximity Transducer System for Rotating Machinery Protection

The Bently Nevada 330104-08-15-10-02-00 is a factory-matched, three-component proximity transducer system belonging to the 3300 XL 8 mm product family. It delivers continuous, non-contact measurement of shaft radial vibration, axial position, and differential expansion across a broad range of critical turbomachinery. The system integrates a 8 mm diameter eddy-current probe, a 0.5 m integral armored cable, a 5 m (15 ft) extension cable, and a standard (non-barrier) 3300 XL oscillator-demodulator driver — all calibrated as a matched set at the factory to eliminate field calibration uncertainty.

In a machinery protection architecture, this transducer system occupies the first link in the signal chain: it converts mechanical shaft displacement into a proportional DC voltage that feeds directly into Bently Nevada 3500 Series monitor cards or 3300 Series rack modules. The output linearity across the 0.25 mm to 2.25 mm gap range — held to ±1% of full scale — is what allows downstream trip logic to operate with deterministic accuracy rather than statistical approximation.

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Technical Parameters

Hardware Logical Analysis

The 330104-08-15-10-02-00 operates on the eddy-current (electromagnetic induction) principle. The probe tip houses a flat coil wound on a ferrite core, driven by the oscillator section of the 3300 XL driver at a carrier frequency in the range of 1.0 MHz. When the conductive shaft surface enters the probe’s electromagnetic field, eddy currents are induced in the target, loading the coil and reducing its Q-factor. The demodulator section of the driver extracts this amplitude change and converts it to a DC voltage linearly proportional to the air gap between probe tip and shaft surface.

EMC Design: The integral cable uses a double-layer stainless-steel braid shield with 95% optical coverage, terminated at both ends to the coaxial connector shell. This construction attenuates common-mode interference from adjacent power cables and variable-frequency drives — a critical requirement in turbine bearing pedestals where 480 V motor feeders and instrumentation cables share the same cable tray. The driver enclosure is die-cast aluminum with conductive gasket sealing, providing a Faraday cage that suppresses radiated emissions and maintains immunity per IEC 61000-4-3 (10 V/m field strength).

Factory-Matched Calibration: Unlike field-assembled transducer systems, the 330104-08-15-10-02-00 is calibrated as a complete three-component set (probe + extension cable + driver) against a reference target of AISI 4140 steel. The calibration record documents the actual sensitivity coefficient and zero-gap offset for that specific serial number combination. This eliminates the ±3–5% sensitivity error that accumulates when probes and drivers are mixed from different production lots — an error that, at 200 mV/mil nominal sensitivity, translates to a 6–10 mV/mil uncertainty that can shift alarm setpoints by 30–50 µm.

Mechanical Robustness: The probe body is machined from 316L stainless steel with a ceramic-filled epoxy tip encapsulant rated to 121 °C continuous. The 3/8-24 UNF thread allows installation in standard Bently Nevada probe holders without adapter hardware. The armored integral cable uses a PTFE-insulated center conductor with stainless-steel braid over-braid, providing resistance to hydraulic oil, steam condensate, and bearing lubricants common in turbine environments.

System Integration Benefits

• Direct 3500/3300 rack compatibility: The −24 VDC supply and linear voltage output interface natively with Bently Nevada 3500/40M, 3500/42M, and 3300 Series monitor cards without signal conditioning adapters, preserving the full 10,000 Hz bandwidth through to the rack’s DSP.
• Deterministic trip response: The DC-coupled output means shaft displacement changes appear at the monitor card input within the propagation delay of the cable (approximately 5 ns/m), enabling the 3500 rack to execute a trip relay within one voting cycle — typically 20 ms — without analog filter lag.
• API 670 5th Edition compliance: The system meets all transducer performance requirements of API Standard 670, including sensitivity tolerance, frequency response, and temperature range, supporting regulatory acceptance for critical machinery protection on new installations and retrofits.
• Non-contact measurement eliminates wear: Because the probe never contacts the shaft, there is no mechanical wear mechanism, no lubrication requirement, and no periodic replacement interval driven by contact fatigue — reducing maintenance labor on turbine outage schedules.
• Broad DCS integration: The −1 to −17 VDC output is accepted by analog input cards on Emerson DeltaV, ABB 800xA, Siemens PCS 7, and Yokogawa CENTUM VP via standard ±10 V differential input channels, enabling condition data to flow into the plant DCS historian without a separate signal converter.
• Suffix-coded configuration traceability: The six-field suffix code (08-15-10-02-00) encodes probe diameter, integral cable length, driver type, extension cable length, and options — providing unambiguous procurement and maintenance documentation that survives personnel turnover and plant ownership changes.
• ATEX/IECEx zone coverage: The standard -10 driver suffix is rated for Zone 2 (non-incendive) installations. For Zone 0/1 intrinsically safe requirements, the -05 barrier driver suffix is available, using the same probe and extension cable — allowing a single probe installation to be upgraded to IS classification by driver substitution alone.
• System 1 software integration: When connected through a 3500 rack with Ethernet gateway, the transducer’s gap voltage, 1× amplitude, 2× amplitude, and overall vibration values are available as tagged process variables in Bently Nevada System 1, enabling trend analysis, alarm rationalization, and predictive maintenance workflows without additional hardware.

Quality Assurance & Global Logistics

Every Bently Nevada 330104-08-15-10-02-00 unit supplied by siemensplc.com is sourced through verified industrial distribution channels with documented provenance. Pre-shipment inspection covers visual integrity of the probe tip encapsulant, connector shell condition, cable armor continuity, and a functional gap-voltage output check against the factory calibration curve. Units that do not meet the original Bently Nevada sensitivity specification of 7.87 V/mm ±1% are quarantined and not shipped.

Shipments originate from our warehouse in Xiamen, China. Standard export terms are EXW Xiamen, with DDP, DAP, and FOB Xiamen available on request. Typical transit times are 3–5 business days to Southeast Asia, 5–7 days to the Middle East and Europe, and 7–10 days to North and South America via DHL Express or FedEx International Priority. For project-critical deliveries, same-day dispatch is available for orders confirmed before 14:00 CST. All shipments include a commercial invoice, packing list, and certificate of conformance. ATEX/IECEx documentation is included where applicable. A 12-month warranty covers manufacturing defects from the date of shipment.

Contact Information

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