What is degassing?
Degassing is running an ultrasonic bath for 10–20 minutes after fresh make-up to drive out dissolved air. Until the air leaves, it cushions bubble collapse and cavitation is weak. A degassed bath cleans measurably faster than the same chemistry used straight after filling.
Tap water holds a substantial volume of dissolved air. Introduce ultrasound and that air comes out of solution as fine bubbles, which absorb the acoustic energy instead of transmitting it. The bath looks like it is working — it hisses and shimmers — but the implosions that do the cleaning are being damped.
Degassing is simply time under power. Run the transducers with the bath at working temperature and no parts loaded for 10–20 minutes; most units clear within that window. Some machines have an explicit degas cycle that pulses the transducers, which is faster.
Degas after every fresh fill and after any large water top-up. It costs twenty minutes once, and it is the cheapest performance improvement available on an ultrasonic line.
