Ultrasonic cleaning basics · 2 min read · Updated 2026-09-25

What is ultrasonic cleaning?

Sound above hearing range, a liquid, and millions of collapsing bubbles: the short version of how an ultrasonic cleaner works and what it is good at.

Technical guide. Figures are taken from our own spec tables; for your process we confirm the settings with a cleaning trial.

Machined parts laid out before cleaning

There are many types of cleaning solutions that are available in the market today. One of the most popular and sophisticated ones is ultrasonic cleaning. Not only is it time-efficient, using an ultrasonic cleaner is cost effective and eco-friendly, as well.

Unlike manual cleaning which traditionally involves scrubbing and rinsing, using an ultrasonic cleaner will reduce expensive man-hours. Ultrasonic cleaning utilizes powerful ultrasonic waves which are produced by transducers. The high frequency creates microscopic bubbles in the cleaning liquid where your equipment is submerged during the cleaning operation. Through continued agitation of the cleaning liquid, it causes these microscopic bubbles to implode, resulting in a cavitation effect.

The cavitation effect then results in the cleaning action. It is efficient to use ultrasonic cleaning especially when cleaning complex parts and machines with hard-to-reach crevices. As long as the equipment is fully submerged in the tank for the cleaning, all surface areas will be subjected to the cleaning process.

A water-based cleaning liquid matched to the soil, usually a biodegradable detergent at a few per cent, makes the cavitation markedly more effective than plain water; see the cleaning liquids article. Sonixtek has a wide range of ultrasonic cleaners which can take on industrial cleaning demands. This is especially cost efficient when you are cleaning big machines and parts, making them perfect for electronics service shops, workshops, aerospace and marine parts, railway, automotive shops, assembly lines, and electronic products.

The longer article on ultrasonic cleaning covers waves, cavitation, frequency, temperature, generators, transducers and tank features in detail.

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