Ultrasound is maybe the least familiar condition monitoring tool but the biggest payback for identifying early stage lubrication conditions that are root cause for machine failure. It’s also known as a great tool for identifying valve operation, steam trap integrity, electrical arcing, tracking and corona to name few. As a power efficiency auditing tool common applications are looking for process leakage and compressed air losses. Lastly, structure-borne ultrasound can be extremely useful for identifying the condition of slow speed rotating bearings. This technology has many uses and is a complementary condition-monitoring application for any program.