How to clean large surgical instruments?

When cleaning large, dense objects it is important that if at all possible they are submerged in the ultrasonic tank at an oblique angle. This allows the energy developed to rebound around the ultrasonic tank maximising the full potential of the cleaner. This is particularly important if the ultrasonic tank has only one radiating face, i.e. the base of the tank.
If the object cannot be orientated obliquely (possibly because of weight) then the distance between the radiating face of the ultrasonic and the object should be at least 100mm. This gap then allows a certain amount of energy to rebound off the inner walls of the tank thus enveloping the object more efficiently and causing less reflection, which can reduce the ultrasonic energy and cause premature erosion of the ultrasonic radiating face.
Large, dense objects can also absorb a large amount of ultrasonic energy to a degree that whilst the facing edge of the object is being cleaned the uppermost part is not seeing enough activity. In this case we would recommend two or more radiating faces, which would mean that we can hit the object from more than one direction.