Description

The Bently Nevada 990-05-50-02-00 is a 2-wire, loop-powered vibration transmitter engineered by Bently Nevada for continuous, non-contact shaft vibration monitoring on non-critical rotating machinery . This compact device integrates a 3300 NSv proximity probe and Proximitor® electronics into a single rugged enclosure, eliminating the need for external signal conditioning units . The Bently Nevada 990-05-50-02-00 converts relative shaft vibration into a standard 4-20 mA DC signal proportional to peak-to-peak displacement, providing a cost-effective solution for OEMs and plant operators seeking reliable vibration trending and basic machinery protection without the complexity of full monitoring systems .

Application Scenarios

In a centrifugal air compressor package supplied by an OEM, the Bently Nevada 990-05-50-02-00 is mounted in the confined space between the bearing housing and the shaft. The transmitter’s compatibility with the 3300 NSv proximity probe allows installation in tight clearances typical of such machinery . Prior to integration, the OEM relied on standalone velocity sensors that required separate power supplies and signal conditioners, increasing wiring complexity and cabinet space. The 990-05-50-02-00 simplifies the design by providing a direct 4-20 mA signal to the PLC, enabling real-time vibration monitoring and alarm logic without additional hardware . The transmitter’s potted construction withstands the 100% condensing humidity often present in air compressor packages, ensuring reliable operation over extended periods .

In a chemical processing plant, the Bently Nevada 990-05-50-02-00 was deployed on a critical cooling water pump where bearing wear had previously led to unplanned shutdowns. The transmitter’s 5.0-meter system length (probe + extension cable) accommodated the distance from the probe mounting point to the control cabinet without requiring splice joints . The plant’s maintenance team valued the non-interacting zero and span potentiometers under the transmitter label, which allowed in-situ loop calibration without affecting the probe’s gap voltage . Over 18 months, the continuous 4-20 mA trend data enabled predictive maintenance scheduling, extending pump bearing life by 30% and eliminating two emergency repairs.

Parameters