Product Overview

The Bently Nevada 144181-50 is a high-performance 3300 XL series Proximitor Sensor, serving as the core electronic component of a non-contacting proximity transducer system. This device is specifically calibrated for use with 5 mm and 8 mm proximity probes to monitor the health of critical rotating machinery. By generating a high-frequency radio frequency (RF) signal, the 144181-50 measures eddy current changes caused by the proximity of a conductive target, such as a turbine shaft. It then converts these complex signals into a stable voltage output proportional to the distance between the probe tip and the target. This hardware is indispensable for providing real-time data on vibration, thrust position, and speed to Turbine Supervisory Instrumentation (TSI) systems.

Key Technical Characteristics and Hardware Parameters

The 144181-50 is designed for extreme precision and environmental resilience, ensuring signal stability even in the presence of electromagnetic interference and thermal fluctuations.

• Model Number 144181-50

• System Compatibility Bently Nevada 3300 XL 5 mm and 8 mm Proximity Transducer Systems

• Signal Output 7.87 V/mm (200 mV/mil) standard scale factor

• Linear Range 2.0 mm (80 mils) typical for 8 mm systems

• Input Voltage -17.5 Vdc to -26 Vdc

• System Length Calibration 5.0 Meters (Total length including probe and extension cable)

• Temperature Range Operational from -51°C to +100°C (-60°F to +212°F)

• Material Construction Impact-resistant technopolymer housing with a 304 stainless steel base

• Mounting Integrated DIN-rail clips or bulkhead mounting plate

• Connector Type Coaxial "ClickLoc" connectors for secure, finger-tight gold-plated interfaces

Industrial Applications and Operational Use Cases

This Proximitor Sensor is a global standard for machinery protection in heavy industrial sectors where high-speed rotating assets are mission-critical.

• Radial Vibration Monitoring Tracking the dynamic motion of shafts in gas and steam turbines to identify unbalance, misalignment, or bearing instabilities.

• Axial Thrust Position Measuring the static longitudinal position of a rotor relative to the thrust bearing to prevent internal mechanical contact and catastrophic failure.

• Rotational Speed Detection Providing high-resolution pulses from gear teeth or keyways for overspeed protection and tachometer displays.

• Hydroelectric Generators Monitoring guide bearing clearances and shaft runout in large-scale power generation units.

• Refinery and Petrochemical Equipment Safeguarding centrifugal compressors and high-service pumps against sudden mechanical shifts in volatile environments.

The 144181-50 is fully compatible with the Bently Nevada 3500 series monitoring rack and the System 1 machinery management software, allowing maintenance teams to perform advanced diagnostic trending and root-cause analysis on their most valuable equipment.