Product Overview

The 330850-91-00 is a high-performance signal conditioner within the Bently Nevada 3300 XL Proximity Transducer System. Specifically designed to interface with 25 mm proximity probes, this Proximitor sensor converts the eddy current signal from the probe into a proportional voltage output. This data is essential for monitoring large-scale industrial machinery where significant displacement or vibration ranges are expected. By providing high-linearity measurements, the 330850-91-00 enables Turbine Supervisory Instrumentation (TSI) systems to track shaft position and vibration with laboratory-grade precision, supporting condition-based maintenance and asset protection strategies.

Key Technical Characteristics and Hardware Parameters

This specific 3300 XL 25 mm Proximitor is engineered for long-term stability and ease of integration into industrial control panels.

• Model Identification 330850-91-00

• Probe Compatibility 3300 XL 25 mm Proximity Probes

• System Length 9.0 Meters (approx. 29.5 feet) (Option -91)

• Mounting Option 35 mm DIN rail clips for high-density installation (Option -00)

• Output Signal 0.787 V/mm (20 mV/mil) average scale factor

• Linear Range 12.7 mm (500 mils), beginning at 1.3 mm (50 mils) from the probe tip

• Frequency Response 0 Hz (DC) to 2.5 kHz

• Supply Voltage -17.5 Vdc to -26 Vdc

• Environmental Rating Rated for operation in relative humidity up to 100% (non-condensing)

• Construction Robust zinc housing with integrated coaxial connectors

Industrial Applications and Operational Benefits

The 330850-91-00 Proximitor is a vital component in sectors requiring the monitoring of massive rotating assets. Its extended measurement range, provided by the 25 mm probe system, is particularly advantageous in scenarios where smaller 8 mm probes lack the necessary linear range.

• Hydroelectric Power Generation Monitoring thermal expansion and vibration in large-diameter generator shafts.

• Mining and Metal Processing Tracking displacement in heavy-duty crushers, mills, and conveyor drive systems.

• Renewable Energy Implementing speed detection and structural vibration monitoring in large-scale wind turbine assemblies.

• Steam and Gas Turbines Providing axial thrust position data where large rotor movements are anticipated during thermal transients.

• Industrial Speed Control Serving as a high-resolution input for electronic overspeed protection systems.

The DIN-rail mounting configuration (Option -00) facilitates rapid deployment in standard industrial enclosures, while the 9.0-meter system length allows for flexible placement of the sensor relative to the machine casing, protecting the electronics from the most extreme local heat and vibration.