Bently Nevada 330878-51-05 Proximitor Sensor for Vibration Monitoring

This Bently Nevada Proximitor sensor provides non-contact vibration and position measurements for rotating machinery. It converts physical displacement into a proportional voltage signal for monitoring systems. Engineers can deploy this sensor for turbine, compressor, and pump protection applications. Its precision design ensures reliable operation in critical machine condition monitoring. The sensor integrates seamlessly with Bently Nevada 3500 monitoring systems.

Physical Dimensions and Probe Configuration

The sensor measures 2.0 inches in length and 0.4 inches in diameter. Its stainless steel housing weighs approximately 0.3 ounces for lightweight installation. A 5.0-meter coaxial cable connects the sensor to the driver and monitoring electronics. The unit features a 0.25-inch threaded body for standard mounting hole compatibility. This design simplifies installation and alignment in machine casings.

Electrical Characteristics and Output Signal

The sensor operates on a -24 VDC power supply from the monitoring system. It provides a linear output signal of -2 to -18 VDC over the measurement range. The unit achieves a sensitivity of 7.87 V/mm (200 mV/mil) for precise displacement measurement. This sensitivity ensures accurate detection of small vibration amplitudes. The sensor maintains linearity within ±1% over its calibrated gap range.

Measurement Range and Target Specifications

The sensor offers a standard linear measurement range of 0.25 mm to 2.0 mm (10 to 80 mils). It requires a ferrous metal target for proper eddy current operation. The unit maintains stable performance with targets of AISI 4140 steel or equivalent. The sensor provides a gap sensitivity of 200 mV/mil for consistent readings. This performance supports reliable vibration monitoring across various machine types.

Frequency Response and Dynamic Performance

The sensor delivers a frequency response from DC to 10 kHz for comprehensive vibration analysis. This bandwidth captures both static position changes and dynamic vibration events. The unit responds to target movement within 0.5 microseconds typically. This rapid response enables detection of high-frequency machine vibrations. The sensor performs effectively at shaft speeds up to 60,000 RPM.

Connector Interface and Cable Assembly

The unit terminates in a standard 3-pin connector for driver module attachment. This connector provides power, signal, and ground connections securely. The coaxial cable includes a braided shield for noise immunity in industrial environments. The cable also features a jacket resistant to oil, water, and abrasion. This construction ensures reliable signal transmission in harsh machine environments.

Environmental Ratings and Operating Ranges

The sensor operates reliably from -51 to 177 degrees Celsius ambient temperature. Its hermetically sealed housing resists moisture and contaminant ingress effectively. The unit withstands vibration up to 20 g for demanding machine applications. The sensor meets NEMA 4X standards for environmental protection. This robust design ensures long-term reliability in continuous monitoring applications.

Technical Specifications Overview