Ultrasonic cleaners have been around since the 1950s, and smaller versions have appeared in home appliances since 1970, but how does an industrial ultrasonic cleaner work? All types of ultrasonic cleaners use cavitation bubbles—bubbles created by rapid changes of pressure in a liquid–to clean parts with lots of crevices and complex shapes within them. Why Ultrasonic Cleaners Are Popular Ultrasonic cleaners are popular for a couple of reasons: They are less destructive than other methods for cleaning electric motor parts. Pumps, sprayers, and agitators may be damagin