The same 4-20 mA technology used to measure temperature, flow, pressure and speed can also be extended to measure the overall vibration of rotating machines. Adding a vibration sensor/transmitter to the machine provides a critical measure of the machines health and can be used to identify changes in balance, alignment, gears, bearings and many other potential faults that may not be currently detected. Monitoring machine vibrations can prevent undetected catastrophic failures from occurring and at the same time require minimal human interaction to provide continous machine protection.