Bently Nevada 330180-X2-00 MOD-181634-02 Proximity Transducer – 3300 XL Series

Bently Nevada 330180-X2-00 MOD:181634-02 — Eddy-Current Proximity Transducer for Rotating Machinery Protection

The 330180-X2-00 (modification code MOD:181634-02) is a precision eddy-current proximity transducer manufactured by Bently Nevada as part of the 3300 XL Series machinery protection platform. It is engineered for continuous, non-contact measurement of radial shaft vibration and axial position displacement in high-speed rotating equipment operating under sustained mechanical and thermal stress. The transducer operates on the principle of electromagnetic induction: a high-frequency oscillating magnetic field generated at the probe tip induces eddy currents in the conductive target surface; changes in the gap between probe tip and target alter the eddy-current magnitude, which the associated Proximitor driver converts into a calibrated DC voltage output proportional to displacement.

This model is specified by rotating machinery engineers and reliability professionals across power generation, oil and gas, petrochemical, and marine propulsion sectors where API 670 compliance is a contractual requirement. Its X2 cable configuration designates a specific extension cable interface geometry that maintains signal integrity over the full operating temperature range without requiring loop recalibration when replacing a probe in an existing 3300 XL installation.

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

Technical Parameters

Hardware Logical Analysis

The 330180-X2-00 probe body houses a wound coil assembly embedded in a thermally stable ceramic-filled epoxy matrix. The coil is driven by the companion Proximitor driver at a carrier frequency of approximately 1 MHz, which is high enough to achieve sub-micron displacement resolution while remaining below the threshold where skin-depth effects in the target material introduce nonlinearity. The X2 designation specifies the extension cable’s characteristic impedance and capacitance-per-unit-length parameters, which are matched to the Proximitor driver’s input network. This impedance matching is critical: a mismatched cable introduces a scale factor shift that cannot be corrected by the monitor’s software gain adjustment alone.

The probe tip geometry is machined to a tight concentricity tolerance (< 0.01 mm TIR) to ensure that the electromagnetic field pattern remains axially symmetric. Asymmetric field patterns produce a once-per-revolution electrical runout component that is indistinguishable from mechanical shaft bow in the monitor’s orbit display. The ceramic-filled housing material has a coefficient of thermal expansion (CTE) closely matched to the coil winding, suppressing thermally induced scale factor drift across the full –35 °C to +177 °C operating envelope.

EMC performance is achieved through a combination of coaxial cable shielding, ferrite bead filtering at the connector interface, and the inherently differential nature of the eddy-current measurement: common-mode electrical noise on the supply and signal lines is rejected by the Proximitor driver’s instrumentation amplifier stage, which maintains > 80 dB CMRR across the audio frequency band. This makes the 330180-X2-00 suitable for installation in switchgear rooms and motor control centers where conducted and radiated interference levels exceed IEC 61000-4 Class B limits.

The MOD:181634-02 modification code identifies a specific factory configuration of the probe’s internal coil winding geometry and potting compound formulation, optimized for extended service in high-temperature bearing housings where conventional epoxy potting compounds soften and allow coil movement. The modified formulation retains dimensional stability up to 177 °C with less than 0.3% volumetric change, preserving the calibrated scale factor over the full thermal cycle.

System Integration Benefits

• Direct 3300 XL Loop Compatibility: The 330180-X2-00 is a verified drop-in replacement within existing 3300 XL monitor racks. The X2 cable interface maintains the calibrated loop gain without requiring a full three-component recalibration, reducing planned maintenance downtime from hours to minutes.
• API 670 Contractual Compliance: The transducer meets all dimensional, electrical, and performance requirements of API 670 Fifth Edition, including the Annex D proximity transducer system verification procedure. This satisfies EPC contractor and insurance underwriter requirements for new-build and retrofit machinery protection systems.
• Deterministic Real-Time Response: The DC-to-10 kHz frequency response captures both quasi-static axial position drift and high-frequency sub-synchronous instabilities (oil whirl, oil whip) within a single measurement channel, eliminating the need for parallel sensor installations at different frequency ranges.
• Diagnostic Transparency via Orbit Plots: When paired with a 3300/16 or 3500/42 monitor module, two orthogonally mounted 330180-X2-00 probes generate shaft orbit data that allows maintenance engineers to distinguish between mass unbalance, misalignment, rub, and fluid-film instability without removing the machine from service.
• High-Temperature Bearing Housing Suitability: The MOD:181634-02 formulation sustains calibrated operation at 177 °C continuous, covering the bearing housing temperatures of most industrial steam turbines operating at inlet steam conditions up to 540 °C / 140 bar, where bearing metal temperatures typically reach 120–160 °C.
• Minimal Electrical Runout Contribution: Factory-verified electrical runout < 6.35 µm (0.25 mil) peak-to-peak across the linear range, consistent with API 670 acceptance criteria. This preserves the monitor’s alarm setpoint margin and reduces nuisance trips in machines with inherently low mechanical runout.
• Hazardous Area Certification Pathway: The 3300 XL series includes ATEX / IECEx certified configurations. The 330180-X2-00 base design is compatible with the certified barrier and Zener diode safety barrier accessories required for Zone 1 / Division 1 installations, enabling deployment in flammable gas atmospheres without a separate sensor design.
• Scalable Multi-Channel Architecture: A single 3300 XL rack accommodates up to 16 monitor modules, each supporting two proximity measurement channels. A complete turbine supervisory instrumentation (TSI) system covering radial vibration (4 planes), axial position (2 channels), differential expansion, and eccentricity can be built from a single rack with standardized 330180-X2-00 probes throughout, simplifying spare parts inventory management.

Quality Assurance & Global Logistics

Every 330180-X2-00 unit supplied by siemensplc.com is sourced as genuine Bently Nevada OEM hardware through verified supply channels. Prior to dispatch, each probe undergoes a functional verification sequence: gap-voltage linearity is checked at five points across the 0.25–2.25 mm linear range using a calibrated micrometer fixture; frequency response is swept from 10 Hz to 10 kHz to confirm the –3 dB point; insulation resistance between the coil circuit and the probe body is measured at 500 VDC to confirm > 100 MΩ. Test records are retained and available upon request for regulated industries requiring traceability documentation.

Packaging follows anti-static and moisture-barrier protocols: the probe tip is protected by a machined aluminum cap, the unit is sealed in a moisture-barrier bag with desiccant, and placed in a foam-lined transit case rated for 50 G shock per ASTM D4169. Export documentation — commercial invoice, packing list, certificate of origin, and ECCN classification — is prepared as standard for international shipments.

Logistics operations are based in Xiamen, China. In-stock units ship within 1–3 business days via DHL Express, FedEx International Priority, or UPS Worldwide Expedited, with typical transit times of 3–5 business days to Europe, North America, and Southeast Asia. Air freight consolidation and sea freight options are available for bulk orders. All shipments are fully insured and tracked from dispatch to delivery confirmation.

Contact Information

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