Patent ID: 7708836

Claim:
A system for testing the efficiency of an ultrasonic cleaning device, comprising an ultrasonic cleaning device and a testing device, the testing device comprising a vessel containing at least one fluid that undergoes a visibly discernable change in color or color intensity upon exposure to collapsing cavitation bubbles produced by the movement of ultrasonic waves generated by the ultrasonic cleaning device, wherein a wall of the vessel is constructed to include at least a portion that is transparent, wherein the vessel further comprises a cavitation promoter comprising glass beads or quartz sand, and wherein the at least one fluid comprises least one of aqueous red phosphorus or phosphite, a methanol solution, a redox system solution, a halogenide ion solution, a haloorganic compound solution, an oxidative or reductive solution forming or decolorizing a colorant, and a solution polymerizing an organic monomer.