The Megasonic-/ Ultrasonic-System for cleaning basically consists of three parts:

- Megasonic-/ Ultrasonic-Generator

- Megasonic-/ Ultrasonic-Transducer

- Bath with liquid adjusted to the cleaning problem


The Megasonic-/ Ultrasonic-Generator transforms the mains voltage of 50/60 Hz to a frequency corresponding to the operative frequency of the transducer.

Usually this frequency is situated between 20 kHz and 4 MHz. The resulting electric oscillations are supplied to the transducer through a screened isolated cable. The transducer transforms these electric oscillations to mechanic sound waves. By that, the surrounding liquid is set in motion.

Each wave leads to alternating phases of high and low pressure according to the transducer expanding or contracting.

On contracting which means the phase of low pressure innumerable small cavities develop in the liquid due to its restricted tractability. These small cavities collapse during the following expanding of the transducer which means the phase of high pressure. They are imploding. This phenomenon is called cavitation.

Around the cavitation bubble, local high pressure develops as well as considerable turbulences and fluid motions due to the sudden implosion. These events are the actual criteria to the removal of dirt particles from the surface of an object. Cavitation bubbles mainly arise at the interface between the liquid and the object to be cleaned. That is exactly where they are desired.

With increased frequency the cavitation bubbles are getting smaller with lower energy. Through the relative high frequency of 1 MHz small particles can be removed from fragile structures and surfaces.