Why Are Higher Ultrasonic Cleaning Frequencies Required?

Choosing the right high frequency ultrasonic cleaner is the key to successfully cleaning parts that have a delicate physical structure. However, if the ultrasonic cleaning system frequency is set too high, cleaning could take longer and become less effective. If the frequency is set too low, it could damage the more delicate parts. Ultrasonic cleaning systems are extremely versatile and effective in most cleaning applications, but only if the operating frequency matches the tasks to be performed.

Ultrasonic cleaning systems generate a high-frequency electric signal that is converted into sound waves by an ultrasonic transducer. The transducer is submerged in the cleaning tank filled with water and generates sound waves in the liquid. Microscopic cavitation bubbles appear wherever the cleaning solution can penetrate. They form in the low-pressure troughs and collapse in high-pressure peaks.

This collapse of the bubbles is responsible for the cleaning action of an ultrasonic cleaning system. The bubbles can clean inside hollow tubes, in the thread of bolt holes, inside dead-end holes, and in cracks.

Low frequency — have longer cycle times and the wave troughs are wider resulting in bigger bubbles. Typical candidates for low-frequency cleaning include automotive parts such as cylinder valves and carburetors.

High frequency — have smaller bubbles because there is less time for them to grow in the comparatively narrow troughs. Using a high frequency ultrasonic cleaner is required for cleaning delicate parts such as medical instruments, semiconductor components, and computer parts. The selection of the ultrasonic frequency has to balance between the need for reduced cleaning power due to the fragility of the parts and the type of contamination that is being removed.

Kaijo has a full product line of industrial ultrasonic cleaning equipment and has extensive experience in the field of ultrasonic cleaning. For more information read the complete article “Why Are Higher Ultrasonic Cleaning Frequencies Required?”. If you have questions or would like to set up a free consultation to discuss your industrial cleaning requirements, contact Kaijo Shibuya at 408–675–5575 or email info@kaijo-shibuya.com.