- Ultrasonic cleaners can produce irritating, high-frequency noise and hearing protection may be needed in case of continuous exposure.
- It is recommended to avoid using flammable cleaning solutions because ultrasonic cleaners increase the temperature even when not equipped with a heater. (Some industrial units are specifically certified as explosion proof.)
- When the unit is running, contact with the cleaning solution could cause thermal or chemical injury; the ultrasonic action is relatively benign to living tissue but can cause discomfort and skin irritation.[13]
- Ultrasonic cleaners are electrically powered, meaning there is a risk of electric shock in case of malfunction, especially if the cleaning solution comes into contact with electrified components.