Ultrasonic Frequency in Cleaning Applications

In the simplest terms,


Properly applied, ultrasonics can perform a more thorough, more complete cleaning job than any other cleaning method. Ultrasonics is a non-destructive method of cleaning which utilizes sound waves to form and implode vapor pockets on the surface of contaminated parts. This implosion results in the release of stored energy that creates a virtual scrubbing or cleaning action on the surface of the part to be cleaned.

In ultrasonic cleaning, the pressure phase of a sound wave is used to provide the cleaning action. Sonication creates areas in the liquid where negative pressure exists. At these points on the part to be cleaned, thousands of minute vapor bubbles are formed and these bubbles effectively scrub the part. As the ultrasonic energy level alternates (a half second later) the pressure in this same zone becomes positive and the vapor bubbles implode. This implosion (the bubbles bust inwardly) occurs with great violence. This action is commonly called “cavitation” and is not to be confused with the formation of air bubbles caused by degassing of water. While the quantity of energy in any one implosion is extremely small, it is calculated that enormous pressures in the order of 10,000 pounds per square inch and extreme temperatures of approximately 20,000 oF are generated. This cavitational activity–the formation and bursting of these vapor pockets–actually forms the scrubbing or cleaning action on the surface of the part.

Power Sonics TM Ultrasonic Transducers – A Magnus Engineered Equipment Exclusive

Power SonicsTM ultrasonic transducers are mechanically strong and capable of handling large amounts of power – a desirable feature when difficult cleaning jobs are encountered. Power SonicsTM operate at a frequency of 20 kHz whereas conventional sonic cleaning systems operate at 25 or 40 kHz. To see the difference in cleaning power, we need to examine the following chart.

Ultrasonic Cleaning Power



Note that the “y-axis” is the relative strength or cleaning power of the ultrasonic system.

Ultrasonics running at 20 kHz are 5 times stronger than those running at 25 kHz and about 20 times stronger than those running at 40 kHz.

Greater cleaning power allows for faster cleaning speeds, more efficient cleaning, and the ability to clean the toughest substrates.


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