Bently Nevada 330180-X1-CN MOD-143416-29 Proximitor Sensor – 3300 XL Series

Bently Nevada 330180-X1-CN MOD:143416-29 — Eddy-Current Proximitor Sensor for Critical Rotating Machinery Protection

The Bently Nevada 330180-X1-CN MOD:143416-29 is a field-hardened, non-contact eddy-current Proximitor Sensor forming the signal-conditioning core of the 3300 XL machinery protection measurement chain. It converts the raw impedance variation detected by a paired 3300 XL probe into a calibrated DC voltage proportional to the gap between probe tip and target shaft surface. This output feeds directly into Bently Nevada 3500 Series monitoring racks or third-party protection systems, enabling continuous, sub-millisecond-latency shaft radial vibration and axial position measurement without any mechanical contact with the rotating element.

Deployed across steam turbines, centrifugal compressors, boiler feed pumps, gearboxes, and marine propulsion drivetrains, the 330180-X1-CN is specified wherever API 670 machinery protection compliance is mandatory. Its internal oscillator-demodulator circuit operates at a fixed carrier frequency matched to the 3300 XL probe geometry, ensuring the entire measurement chain maintains the sensitivity and linearity coefficients documented in the Bently Nevada calibration database — a prerequisite for alarm setpoint traceability in safety-instrumented systems.

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

Technical Parameters

Hardware Logical Analysis

The 330180-X1-CN houses a self-contained oscillator-demodulator circuit that drives the paired 3300 XL probe at a fixed RF carrier frequency. The probe coil, extension cable, and Proximitor form a resonant tank circuit whose impedance shifts as the conductive shaft surface modulates eddy-current losses. The Proximitor’s demodulator extracts the envelope of this impedance variation and outputs a DC voltage with a tightly controlled scale factor of 7.87 V/mm.

EMC Architecture: The internal PCB employs a multi-layer ground-plane topology that attenuates common-mode noise injected via the cable shield. The oscillator stage is enclosed in a mu-metal sub-shield, reducing susceptibility to external magnetic fields generated by motor windings or bus bars in adjacent cable trays. Conducted emissions are suppressed by an LC filter on the −24 VDC supply rail, keeping radiated interference below CISPR 11 Class A limits without external filtering.

Thermal Stability: The scale factor drift across the −35 °C to +85 °C operating band is held to ±0.5% of full scale by a temperature-compensated demodulator reference. This is achieved through matched NTC/PTC resistor networks in the gain stage, ensuring that alarm setpoints established during cold commissioning remain valid at full operating temperature without field recalibration.

Cable-Length Compensation: The MOD:143416-29 modifier designates a factory-configured internal compensation network matched to a specific probe-plus-extension-cable total length. This compensation corrects for the distributed capacitance and resistance of the cable, which would otherwise shift the resonant frequency and alter the scale factor. Substituting a Proximitor with a different MOD code into an existing loop without recalibration will introduce a systematic measurement error — a critical detail for maintenance planners managing spare-parts interchangeability.

Output Stage Protection: The voltage output is short-circuit protected and reverse-polarity tolerant on the supply rail, allowing the unit to survive wiring errors during commissioning without internal damage. The output clamps at approximately −26 VDC under fault conditions, preventing downstream monitor input stages from being driven outside their rated input range.

System Integration Benefits

• Direct 3500 Series Rack Compatibility: The −24 VDC output interfaces natively with Bently Nevada 3500/42M and 3500/45 Proximitor I/O modules. No signal conditioning, impedance matching, or additional transmitters are required between the Proximitor and the monitor rack input terminals.
• API 670 Alarm Setpoint Traceability: Because the scale factor is factory-certified and documented in the Bently Nevada calibration database, alarm and danger setpoints entered in the 3500 rack can be directly expressed in engineering units (µm pk-pk or mil pk-pk) without field-level calibration verification at each maintenance interval.
• Sub-Millisecond Signal Latency: The demodulator bandwidth exceeds 10 kHz, passing shaft vibration frequency content well above the 1× and 2× running-speed components of interest in most turbomachinery protection applications. This ensures the protection system receives an undistorted representation of shaft dynamic behavior, including sub-synchronous instability events in compressor trains.
• Deterministic Fault Annunciation: The Proximitor outputs a defined out-of-range voltage (typically above −1 VDC or below −26 VDC) when the probe gap falls outside the linear range or the cable is open/shorted. The 3500 rack interprets these as Not OK conditions and drives relay outputs within the rack’s configured response time, enabling deterministic protective action without ambiguity.
• Hazardous-Area Deployment via Zener Barriers: When the probe and cable run into a Zone 1 or Zone 2 classified area, the Proximitor is installed in the safe area and the measurement loop is completed through a certified Zener barrier or galvanic isolator. The 330180-X1-CN’s input impedance and supply current draw are within the entity parameters of standard Bently Nevada-approved barriers, eliminating the need for custom barrier selection.
• System 1 Software Diagnostics Transparency: The continuous DC output voltage is logged by System 1 Evolution software as a gap channel alongside the dynamic vibration channel. Trending the DC gap value over time reveals slow shaft centerline migration caused by bearing wear, thermal growth, or foundation settlement — a diagnostic capability unavailable with contact-type sensors.
• Drop-In OEM Replacement: The 330180-X1-CN is dimensionally and electrically identical to earlier 3300 XL Proximitor variants. Replacement requires only connector re-termination and a gap verification check; no rack reconfiguration, software parameter changes, or probe replacement is necessary, minimizing planned outage duration.
• Reduced Spare-Parts Inventory Complexity: A single Proximitor model covers multiple probe tip diameters within the 3300 XL family when the correct MOD code is matched to the installed cable length. This allows maintenance organizations to rationalize their critical-spare inventory to a small number of verified MOD variants rather than stocking one unit per machine train.

Quality Assurance & Global Logistics

Every Bently Nevada 330180-X1-CN MOD:143416-29 unit offered through siemensplc.com is sourced through verified supply channels with full part-number and serial-number traceability back to the original Baker Hughes manufacturing record. Units are not relabeled, remanufactured, or field-repaired. The following verification steps are completed before any unit is listed as available:

• Visual and Dimensional Inspection: Housing integrity, connector pin condition, label legibility, and MOD code confirmation against the purchase order.
• Functional Output Verification: Supply voltage applied at −24 VDC; output voltage measured at a known gap reference to confirm scale factor is within ±2% of the 7.87 V/mm nominal.
• Serial Number Cross-Reference: Where manufacturer documentation is available, the unit serial number is cross-referenced against the production batch record.
• Anti-Static and Moisture-Barrier Packaging: Units are individually bagged in ESD-protective film, placed in foam-lined cartons, and sealed with desiccant packs before storage and dispatch.
• 12-Month Warranty: All units carry a 12-month warranty against manufacturing defects from the date of dispatch. Warranty claims are processed with replacement dispatch within 5 business days upon receipt of the defective unit.

Logistics are managed from our warehouse in Xiamen, China. Standard export documentation — commercial invoice, packing list, and certificate of conformance — is prepared for every international shipment. DHL Express, FedEx International Priority, and UPS Worldwide Express are available as primary carriers, with typical transit times of 3–5 business days to Europe, North America, Southeast Asia, and the Middle East. For time-critical plant outages, same-day dispatch is available for orders confirmed before 14:00 CST.

Contact Information

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