Bently Nevada 330130-090-10-00 Proximitor Extension Cable – 3300 Series

Bently Nevada 330130-090-10-00 — 9-Meter Coaxial Extension Cable for 3300 Series Proximitor Sensor Systems

The 330130-090-10-00 is a factory-terminated, 9-meter (30 ft) coaxial extension cable manufactured by Bently Nevada (a Baker Hughes company) for exclusive use within the 3300 Series Proximitor® eddy-current displacement measurement chain. Its function is mechanically simple but electrically critical: it carries the high-frequency oscillator signal from the Proximitor sensor to the proximity probe tip, and simultaneously returns the demodulated DC gap voltage back to the monitor rack. Any impedance discontinuity, dielectric degradation, or connector contact resistance introduced along this path directly corrupts the scale factor (mV/mil or mV/mm) and shifts the gap voltage baseline — errors that propagate undetected into vibration amplitude and DC position readings at the 3500 Series rack.

The cable is rated for continuous operation across the full 3300 Series temperature envelope (−40 °C to +85 °C ambient at the cable body) and is constructed with a solid-center conductor, low-loss polyethylene dielectric, and a double-layer foil-plus-braid shield achieving greater than 95% optical coverage. The characteristic impedance is held to 50 Ω ± 2 Ω along the 9-meter run, ensuring the Proximitor’s internal oscillator sees a consistent load and maintains its calibrated output sensitivity of −7.87 V/mm (−200 mV/mil) for standard 8 mm probe configurations.

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Technical Parameters

Hardware Logical Analysis

The 330130-090-10-00 operates within a three-component eddy-current chain: proximity probe → extension cable → Proximitor sensor. The Proximitor’s internal oscillator drives a 1.0 MHz carrier signal down the center conductor to the probe coil. The probe coil radiates this field toward the target shaft; eddy currents induced in the shaft surface load the coil, reducing its Q-factor and shifting the oscillator’s output amplitude in direct proportion to the air gap. The demodulated DC voltage — nominally −10.0 V at a 2.0 mm gap for an 8 mm probe — returns via the same coaxial path to the Proximitor’s demodulator stage, then as a calibrated analog output (typically 4–20 mA or ±10 V) to the 3500 rack monitor card.

The 9-meter length designation (suffix -090) is not arbitrary. Bently Nevada’s calibration tables for the 3300 Series are length-specific: the total system sensitivity is calibrated as a matched set of probe + extension cable + Proximitor. Substituting a cable of different length or impedance without recalibration introduces a systematic scale-factor error. The -10-00 suffix encodes the connector termination style (BNC, straight) and jacket color (black), ensuring correct identification during installation in multi-cable conduit runs.

From an EMC standpoint, the double-layer shield (foil + braid) provides two distinct attenuation mechanisms. The foil layer (100% coverage) blocks high-frequency electric field ingress above approximately 100 kHz — the frequency range where variable-speed drive (VSD) switching noise and RF interference are most problematic in turbomachinery environments. The outer braid layer provides low-impedance ground continuity along the cable length, suppressing magnetically coupled interference from adjacent power cables and motor windings. The shield is grounded at the Proximitor end only (single-point grounding), preventing ground-loop currents that would appear as low-frequency noise on the gap voltage output.

The gold-plated BNC connectors maintain contact resistance below 5 mΩ across the operating temperature range, preventing thermocouple-effect DC offsets at the connector interface — a failure mode observed with tin-plated connectors in environments with large thermal cycling amplitudes (e.g., outdoor installations on gas turbine exhaust decks).

System Integration Benefits

• Calibration chain integrity: The 330130-090-10-00 is a calibrated system component. Using the OEM cable preserves the factory-certified scale factor (mV/mil or mV/mm) without field recalibration, reducing commissioning time and eliminating systematic measurement bias.
• Deterministic signal latency: The 66% velocity of propagation and fixed 9-meter length produce a deterministic signal propagation delay of approximately 45 ns — negligible relative to the 3500 rack’s sampling interval, ensuring phase accuracy in multi-channel orbit plots.
• Noise floor preservation: The ≥95% shield coverage holds broadband noise contribution from the cable below 1 µV RMS at the Proximitor input, keeping the system noise floor within the 3300 Series specification and maintaining amplitude resolution at sub-micron displacement levels.
• Thermal stability: The solid PE dielectric has a low temperature coefficient of capacitance (TCC ≈ −200 ppm/°C), meaning the cable’s electrical length and characteristic impedance remain stable across the full operating temperature range, preventing thermally induced gap voltage drift in outdoor or high-temperature installations.
• Plug-and-play replacement: The BNC connector geometry and pin dimensions conform to IEC 61169-8, ensuring mechanical interchangeability with all 3300 Series Proximitor sensor input ports without adapter hardware or re-termination.
• Conduit routing flexibility: The 25 mm minimum static bend radius and oil-resistant PVC jacket allow routing through standard 1-inch conduit alongside other instrument cables without jacket degradation from hydrocarbon exposure common in oil & gas installations.
• Diagnostic transparency: A cable with stable, known impedance simplifies fault isolation. If the Proximitor reports an open-circuit or short-circuit condition (typically flagged as a gap voltage outside the −2 V to −18 V valid range), the cable can be isolated and tested with a standard 50 Ω TDR instrument, pinpointing fault location to within ±0.5 m.
• Multi-probe system scalability: The 330130 series is available in lengths from 1.5 m to 30 m (suffixes -015 through -300), all sharing identical electrical specifications. A plant standardizing on the 330130 series can mix cable lengths across measurement points without maintaining separate calibration records for each length, provided the total probe + cable system length matches the Proximitor’s configured range.
• Reduced spare-parts complexity: A single OEM part number covers all 3300 Series 8 mm and 5 mm probe installations at the 9-meter spacing, reducing the number of line items in a plant’s critical-spare inventory and simplifying procurement.

Quality Assurance & Global Logistics

Every 330130-090-10-00 unit supplied through siemensplc.com is sourced as genuine Bently Nevada OEM product, manufactured under Baker Hughes’ ISO 9001:2015 certified quality management system. Units are not refurbished, re-labeled, or sourced from unverified secondary markets. Each cable carries original Bently Nevada part number markings, date codes, and factory labeling consistent with current production standards.

Pre-shipment inspection covers: visual examination of connector bodies and cable jacket for mechanical damage; continuity and shield integrity verification using a calibrated LCR meter; part number and length confirmation against the purchase order. A packing list and certificate of conformance are available upon request for regulated industries (nuclear, aerospace, pharmaceutical).

Logistics operations are based in Xiamen, China — a major southeastern China port city with direct access to international freight hubs at Xiamen Gaoqi International Airport and Xiamen Port. Standard export documentation (commercial invoice, packing list, certificate of origin) is prepared for all international shipments. Typical dispatch time for in-stock units is 1–2 business days from order confirmation. Carrier options include DHL Express (2–5 days to most destinations), FedEx International Priority, and UPS Worldwide Express. For bulk orders or project-critical timelines, air freight consolidation and door-to-door customs clearance services are available on request.

Contact Information

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WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
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