ile this isn't a complete "validation", it's a good idea to see if the sensors in your ultrasonic cleaning machine are doing anything. We recently checked our machine shop and found 3 of 7 have burned the sensor. They still emit sharp shrill voices, but no ultrasound or clean.
There are two ways to quickly check. In the case of ultrasound, a drop of dye in the beaker dissolved much faster, and with the ultrasound, the soda quickly lost its dissolved gas. It is also good to look for bubbles when a dirty part is inserted, because the cavitation of the ultrasound is to give you enhanced cleaning.
