Ultra-Sonic Cleaning System F : 20 to 45 KHz Principle: Ultra-Sonic waves produce microscopic cavities. Cleaning Force: 1.Uni-Directional Force 2.Distant Cleaning Force 3.Non Uniform Force 4.Attenuating Force Drawbacks: i.Non Consistent ii.Non Efficient iii.High Maintenance Cost iv.Vibrations become weak when dirt particles come at bottom