An ultrasonic cleaner, often colloquially referred to as a sonicator, is a cleaning device that uses ultrsound (usually from 150–400 kHz) and an appropriate cleaning solution to clean delicate items. The ultrasound is not effective without the cleaning solution; it enhances the effect of a solution appropriate for the item to be cleaned and the soiling.

They are often employed for cleaning of jewlery, lenses and other optical parts, coins, watches, dental and surgical instruments, fountain pens, industrial parts and electronic equipment. In everyday use such devices may be found in use in most jewelry workshops, watchmakers establishments, or in electronic repair workshops (where it could be used for cleaning an electronic device that has been exposed to particles which hinder its operation). After conclusive studies, ultrasonic cleaning system proves to be more effective compared to other cleaning systems used in the medical field.