An ultrasonic cleaning device contains a tank made of stainless steel (figure 1 (1)), in which the cleaning liquid has to be filled. This can be water + cleaning agent. For better cleaning efficiency cleaning chemicals can be added to the bath. (2)Ultrasonic transducers (3) are mounted at the bottom and sometimes also at the sides of the tank. These transducers convert an electrical alternating voltage in mechanical vibration, like a loudspeaker. An ultrasonic generator (4) produces
However, the bubbles in the ultrasonic bath are much smaller than shown in the video. To increase cleaning efficiency, most ultrasonic devices are equipped with a heater(6) to warm up the liquid.
Many ultrasonic devices also offer the option to select different frequency modes. “Sweep” is normally the standard model. Here the operation frequency sweeps a range of about +/- 1 kHz around a middle frequency. This causes the most common distribution of the bubbles in the tank. Another mode is “pulse”. Here the operating frequency switches very fast between two frequencies, which have a separation of about 1 kHz. The advantage is a higher cleaning efficiency. Older or simpler devices only have a fixed frequency.