noun
ultrasonic cleaner
A device that uses ultrasonic waves in a liquid to clean items such as jewelry, lenses, or small parts.
眼鏡を超音波洗浄器で洗うと、細かい汚れがよく落ちる。
When you clean glasses with an ultrasonic cleaner, fine dirt comes off well.
Standard kanji spelling; 器 emphasizes the device aspect.
Variant spelling using 機 (machine); equally common in technical contexts.
Compound of 超音波 (ultrasonic wave) + 洗浄 (cleaning) + 器/機 (device/machine).