Bently Nevada 330180-X1-CN MOD-145004-82 Proximitor Sensor – 3300 XL Series

Bently Nevada 330180-X1-CN MOD:145004-82 — Eddy-Current Proximity Transducer for Critical Machinery Protection

The Bently Nevada 330180-X1-CN MOD:145004-82 is a field-proven eddy-current proximity transducer belonging to the 3300 XL Proximitor® System. Designed for continuous, non-contact measurement of shaft radial vibration, axial position, and differential expansion on critical rotating machinery, this sensor operates as the primary signal-conditioning front end in API 670-compliant machinery protection architectures. Its role in the control loop is unambiguous: it converts mechanical displacement into a calibrated DC voltage signal that feeds directly into the 3300 Series monitor rack, enabling real-time trip and alarm decisions with sub-millisecond latency.

Unlike general-purpose inductive sensors, the 330180-X1-CN is factory-calibrated against a specific target material (AISI 4140 steel) and gap range, producing a linear output of approximately −7.87 V/mm (−200 mV/mil) across its rated measurement range. This calibration coefficient is embedded in the MOD:145004-82 revision designation, which also encodes the connector type, cable termination standard, and EMC shielding specification applicable to this production batch. Procurement engineers should verify the MOD revision against their installed monitor configuration to ensure signal-chain compatibility without requiring field recalibration.

The sensor body is constructed from 316L stainless steel with a PEEK (polyether ether ketone) tip insert, providing chemical resistance against hydrocarbon condensates, H₂S-bearing atmospheres, and steam environments common in turbomachinery installations. The integral coaxial cable is routed through a stainless armored conduit and terminates in a standard BNC or TNC connector (per the X1 suffix), compatible with Bently Nevada 3300 extension cables of 1 m, 5 m, and 9 m lengths. The complete probe-cable-Proximitor assembly must be treated as a matched set; substituting individual components without recalibration will introduce gain error into the measurement chain.

In turbine protection applications, this sensor is typically mounted in a dual-probe radial arrangement at 90° X–Y orientation per API 670 §5.3, with each probe connected to a dedicated channel on the 3300/16 or 3300/20 monitor card. The monitor card performs gap voltage monitoring, direct vibration (overall), and 1× / 2× vector extraction via its internal DSP. The 330180-X1-CN feeds this chain with a raw gap voltage that must fall within −10 VDC to −18 VDC at the nominal 1.0 mm operating gap, confirming correct installation before the monitor is placed in service.

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

Technical Parameters

Hardware Logical Analysis

The 330180-X1-CN operates on the classical Colpitts oscillator topology embedded within the Proximitor driver module. The probe tip coil generates a high-frequency electromagnetic field (nominally 1.0 MHz carrier). When a conductive target enters the field, eddy currents are induced on the target surface, loading the oscillator and reducing its amplitude. The Proximitor driver demodulates this amplitude change into a DC voltage proportional to the probe-to-target gap — a fundamentally linear relationship across the calibrated range.

The MOD:145004-82 revision incorporates a shielded coaxial cable with a braided outer conductor bonded to the sensor housing at both ends, forming a Faraday cage around the signal conductor. This construction attenuates common-mode electromagnetic interference (EMI) from adjacent power cables, variable-frequency drives (VFDs), and high-current bus bars — all prevalent in turbomachinery enclosures. The shield termination at the Proximitor driver is single-ended (grounded at the driver chassis only), preventing ground-loop currents that would otherwise appear as low-frequency noise on the gap voltage output.

The PEEK tip insert serves a dual function: it provides electrical isolation between the probe coil and the stainless housing (preventing eddy-current loss into the housing itself), and it offers a dielectric constant stable to within ±0.5% across the full operating temperature range. This thermal stability is critical in steam turbine applications where probe body temperatures can cycle between ambient and 110°C during start-stop sequences, as any dielectric drift would shift the effective scale factor and introduce a systematic measurement error.

The CN suffix in the part number denotes a conformal coating applied to the internal PCB of the Proximitor driver, providing moisture and condensation resistance in humid tropical or offshore environments. This coating is applied post-assembly and does not affect the electrical performance of the oscillator circuit, but it extends the mean time between failures (MTBF) in high-humidity installations by reducing corrosion-induced leakage currents on the driver PCB.

System Integration Benefits

• Direct API 670 compliance: The 330180-X1-CN is designed to satisfy API 670 5th Edition requirements for radial vibration and axial position measurement without additional signal conditioning, simplifying machinery protection system certification audits.
• Deterministic signal latency: The DC output architecture eliminates A/D conversion delay at the sensor level; the monitor card receives an analog voltage that is sampled at its own deterministic rate (typically 20 kHz per channel on 3300 Series monitors), preserving phase accuracy for 1× vector analysis.
• Matched-set calibration traceability: Each probe-cable-Proximitor set ships with a factory calibration certificate traceable to NIST standards, enabling direct substitution in safety-instrumented systems (SIS) without field recalibration downtime.
• Broad frequency bandwidth: The DC–10,000 Hz flat response covers subsynchronous instabilities (oil whirl at 0.4–0.48×), synchronous unbalance (1×), and high-order blade-pass frequencies on multi-stage compressors, within a single sensor channel.
• Diagnostic transparency via gap voltage: The raw gap voltage output provides a continuous, observable health indicator for the probe installation. A gap voltage outside the −10 V to −18 V window at nominal clearance immediately flags probe fouling, target runout, or mounting looseness — without requiring a separate diagnostic instrument.
• Redundancy-ready architecture: The sensor’s passive probe design (no active electronics in the probe body) allows hot-standby redundancy configurations where a second probe is pre-installed in an adjacent borehole and switched to the active monitor channel without machine shutdown.
• Compatibility with System 1 software: Gap voltage, direct vibration, and vector data from this sensor chain are natively ingested by Bently Nevada System 1 condition monitoring software, enabling trend analysis, alarm rationalization, and predictive maintenance scheduling without custom integration work.
• Reduced installation variability: The factory-set scale factor and the standardized X1 connector eliminate the two most common sources of field installation error — incorrect sensitivity setting and mismatched cable impedance — reducing commissioning time on new machinery protection installations.

Quality Assurance & Global Logistics

Every unit of the Bently Nevada 330180-X1-CN MOD:145004-82 supplied by siemensplc.com is sourced from verified industrial distribution channels with full batch traceability. Before dispatch from our Xiamen, China facility, each unit undergoes a structured inspection protocol: label and MOD revision verification against the purchase order, connector and cable integrity check, and gap voltage output confirmation at a reference gap using a calibrated test fixture. Units that do not meet the factory specification are quarantined and returned to the supply chain — they are never shipped to customers.

Packaging follows anti-static and shock-isolation standards: the probe is wrapped in ESD-safe foam, placed in a rigid ABS shell, and sealed in a moisture-barrier poly bag with desiccant. The outer carton is rated for international air freight handling (ISTA 2A). Export documentation — commercial invoice, packing list, Certificate of Origin (COO), and Certificate of Conformance (COC) — is prepared for every shipment. HS Code 9031.80 is applied by default; alternative HS classifications are available upon request for specific destination customs requirements.

Shipping from Xiamen is available via DHL Express (2–4 business days to most destinations), FedEx International Priority, UPS Worldwide Express, and sea freight for bulk project orders. In-stock units are dispatched within 1–2 business days of payment confirmation. For urgent plant maintenance requirements, same-day dispatch is available for orders confirmed before 14:00 CST.

A 12-month warranty covers all units against manufacturing defects and non-conformance to the published technical specification. Warranty claims are processed within 5 business days of receipt of the returned unit at our Xiamen facility.

Contact Information

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