With longer wavelengths, low-frequency ultrasonic waves generate large but uneven cavitation bubbles. The collapse of these bubbles produces significant force, making it ideal for:
- 20kHz–25kHz: Assisting experiments such as wastewater treatment, algae inhibition and removal, dispersion of large-particle powders, emulsion extraction, and the treatment of hard-to-degrade organic substances.
- 28kHz: Best suited for rough cleaning tasks, especially heavy-duty applications like removing heavy oils, rust, and stubborn stains.