The cleaning effect of ultrasound is based on the physical principle of cavitation. Here, the ultrasonic generator emits electrical signals at a certain frequency, which are then transferred to the cleaning liquid as ultrasonic waves via a rod-style or plate transducer. The sonic pressure is characterised by an interplay of positive and negative pressure (vacuum). As a result of the high intensity, microscopic bubbles form in the vacuum phases, which then implode in the subsequent overpressure phase, releasing local shock waves with considerable energy densities. In turn this triggers microflows in the liquid, which separate and clean away films and particulate matter from the components to be cleaned.
The ultrasonic generators by Weber Ultrasonics are distinguished by digital generation and adjustment of ultrasonic vibration frequency, constancy of frequency, amplitude and power not achieved so far and the function of intervals.