Seismic velocity measurements provide ideal resolution at typical rotating equipment running speeds. Vibration is always transmitted through the bearings used on rotating equipment. It has been proven time and time again that measuring vibration on rotating equipment is the most universally effective predictive maintenance practice for critical pumps, motors, compressors, fans, cooling towers and rollers.
For example, over time, industrial motor bearings wear out and begin to wobble. Eventually these bearings will need to be replaced, or the machine will fail. But how do you measure the bearing performance to be sure you aren’t changing them out too soon, or in an even worse case, waiting until the machine breaks down and it’s too late? There is a whole world of 4-20 mA loop vibration sensors, like the Seismic Velocity 4-20 mA transmitter from Metrix or IMI Sensors, and they are gaining in popularity.