What is Ultrasonic Cleaning? How Does It Work?

17 April 2026 Plussonic

Ultrasonic Cleaning Technology

Ultrasonic cleaning is a technology that uses high-frequency sound waves in the 20-80 kHz range to provide precision cleaning of industrial parts. This method cleans dirt on part surfaces at micron level through the implosion of microscopic cavitation bubbles formed in liquid.

How is Cavitation Formed?

Electric signals from the ultrasonic generator are converted into mechanical vibrations by transducers. These vibrations create high and low pressure zones in the liquid. Microscopic vacuum bubbles form in low pressure zones and implode when high pressure arrives. The energy released during implosion cleans dirt from part surfaces.

Why is Frequency Selection Important?

  • 25 kHz low frequency: Aggressive cleaning, large parts, heavily contaminated surfaces
  • 40 kHz medium frequency: General purpose cleaning, most common use
  • 80-132 kHz high frequency: Delicate parts, electronics, medical devices

Advantages

Ultrasonic cleaning provides much more effective cleaning than traditional washing methods. Inner surfaces of complex geometry parts, blind holes and threaded surfaces are cleaned at micron level. Since no manual labor is required, labor costs decrease and reproducible results are achieved.