Product Overview

The Bently Nevada 330850-50-00 is a high-performance Proximitor Sensor engineered for the 3300 XL 25 mm Transducer System. This device serves as the primary signal conditioning unit, providing the necessary excitation to the proximity probe and converting the returned eddy current signal into a standardized DC voltage proportional to the distance between the probe tip and the target. Specifically designed for applications requiring a large linear range, the 330850-50-00 is essential for monitoring structural thermal growth and large-scale displacement. It offers a robust upgrade path for legacy 3000 and 7000 series installations, integrating modern RFI immunity and superior thermal stability into existing monitoring architectures.

Key Technical Characteristics and Hardware Parameters

This 25 mm Proximitor sensor is built to deliver high-fidelity data in electrically noisy industrial environments, featuring a compact housing that supports both high-density and traditional mounting.

• Model Number 330850-50-00

• Probe Diameter Compatibility 25 mm

• System Length 5.0 Meters (approx. 16.4 feet)

• Output Signal -4 to -20 Vdc (Analog voltage)

• Sensitivity (Incremental Scale Factor) 0.787 V/mm (20 mV/mil) or 3.94 V/mm (100 mV/mil) depending on specific system configuration

• Linear Range Up to 12.7 mm (500 mils)

• Field Wiring Integrated SpringLoc terminal strips for tool-free, vibration-resistant connections

• Mounting 35 mm DIN-rail or panel-mount compatibility

• RFI Immunity Advanced shielding against high-frequency environmental interference

• Housing Material Polyphenylene sulfide (PPS) and AISI 304 Stainless Steel base

• Operating Temperature -51°C to +100°C (-60°F to +212°F)

Industrial Applications and Operational Use Cases

The 330850-50-00 is a critical component of Turbine Supervisory Instrumentation (TSI), particularly for assets where small-scale vibration sensors lack the necessary range to capture total movement.

• Steam Turbine Differential Expansion Measuring the relative thermal growth between the rotor and the turbine casing during startup and shutdown cycles.

• Centrifugal Air Compressors Providing reliable axial position and radial vibration signals for high-speed industrial compressors.

• Process Gas & Refrigeration Equipment Monitoring structural health in compact or high-density machinery skids where DIN-rail mounting is required.

• Hydroelectric Generators Tracking thrust bearing movement and rotor position in large-scale power generation units.

• Legacy System Upgrades Replacing obsolete 3300 RAM or 7000 series transducers to improve signal accuracy and reduce maintenance overhead.