An apparatus for cleaning industrial components which has a liquid container defining a liquid enclosure for containing a cleaning liquid and ultrasonic transducers having an operating frequency and a wavelength in the cleaning liquid and secured to at least a portion of the liquid container at a spacing of between 2 and 10 wavelengths. During operation, the transducers generate a larger power density in the component-receiving area of the liquid container than an average power density of the liquid container.