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Design and function
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1686-000 GB/2021-03
3.2 Control panel
Fig. 2
Controls for ultrasonic baths with heating
Fig. 3
Controls for ultrasonic baths without heating
1 On/off button for switching the ultrasonic bath on and off
2 Button for setting the heating temperature with temperature scale
3 Button for setting the sonication time with time scale
4 Start/stop button for ultrasound
3.3 Function
The ultrasonic bath uses cavitation triggered by low-frequency
ultrasound. Piezoelectric oscillating systems are located on the
underside of the ultrasonic oscillating tank. The ultrasound gener-
ates large pressure fluctuations in the sonication fluid. Cavitation
bubbles are formed at the pressure minima. At higher ambient
pressures around the bubbles, the bubbles collapse very quickly.
Strong, localised microstreaming then occurs on the surfaces of the
treated objects. As a result soiling is removed from the surface of
the objects. Particles of dirt are lifted off and fresh sonication fluid
follows.
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