| FAQ - Instruments & Equipment - Archived Through 2012
How should one test an ultrasonic unit?
Suspend a piece of heavy-duty aluminum foil into a tank filled with fresh cleaning solution. Run the unit and expose the foil to ultrasonic waves for 30 seconds. Uniform pitting and indentation on the previously immersed foil indicates uniform cleaning power. Areas of the foil without pebbling -- "blind spots” -- are an indication that the unit needs service.