Bently Nevada 330180-91-CN Proximity Sensor

The Bently Nevada 330180-91-CN serves as a high-performance signal conditioner within the 3300 XL 8mm Proximity Transducer System. This device converts the eddy current signals from a proximity probe into a linear voltage output. The resulting signal represents the exact distance between the probe tip and the target shaft. This specific model includes the -CN suffix, indicating compliance with Chinese regional standards and certifications.

Technical Functionality and Operation

The 330180-91-CN generates a high-frequency radio frequency (RF) signal to excite the probe coil. As the conductive target moves, it creates eddy currents that change the amplitude of the RF signal. The Proximitor sensor detects these changes and produces a calibrated DC voltage. This voltage allows for the monitoring of both static gap and dynamic vibration. The system maintains high linear accuracy over a standard range of 2.0 mm (80 mils).

Industrial Applications

• Radial Vibration: Monitoring shaft motion within fluid-film bearings to detect imbalances or misalignments.
• Axial Position: Tracking thrust bearing wear by measuring the longitudinal movement of the shaft.
• Keyphasor Reference: Providing timing signals for phase measurements and rotational speed tracking.
• Eccentricity: Measuring shaft bow during turbine startup and shutdown sequences.

Technical Specifications

Installation and Integration

The 330180-91-CN supports DIN rail mounting or traditional panel mounting options. Its design features integrated terminal blocks for secure wiring. The sensor provides excellent immunity against radio frequency interference. Operators typically integrate this unit with 3500 series racks or similar machinery protection systems. Proper calibration ensures the sensor matches the specific electrical length of the extension cable and probe.