24 / 43
51806-001 en/2021-12
1
electronic GmbH & Co. KG • Heinrichstraße 3-4 • 12207 Berlin • Deutschland • [email protected]
4.5
Further information
4.5.1
Contact liquid
Since inset beakers must be used in the ultrasonic bath in principle, the bath must be
fi
lled with contact liquid. This contact liquid must be able to transfer the ultrasound to
the liquid found in the inset beaker without loss, if possible. The surface tension is very
high in municipal and deionised water. Due to this high surface tension, the cavitation does
not form in the entire solution, but rather only on the oscillating tank bottom or in water
inhomogeneities, in general. To reduce the surface tension, add a surfactant preparation
that is biodegradable, easily disposable, gentle to the material and long-lasting.
We recommend TICKOPUR TR 3, which is easily available from specialist laboratory
supply dealers. Even when used for a long period of time, this preparation does not leave
behind any dirty rims or incrustations, does not turn cloudy, and has an average service life
of 5-7 days before having to be replaced.
Note:
In order to prevent clouding or precipitation of the contact liquid when using very hard
water, the contact liquid can be mixed with deionised water.