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Operation
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5 Operation
5.1 Direct and indirect sonication
Objects can be sonicated directly or indirectly in the ultrasonic bath.
Direct sonication
is the standard process. The objects to be sonicated are placed
in the ultrasonic oscillating tank using suitable accessories, e.g. a basket. There,
they are in direct contact with the sonication fluid in the tank.
Indirect sonication
is used in the following cases:
• Sonication of sample fluids
• Use of chemically aggressive or flammable liquids
• Use of demineralised water without additives
• Removal of chemically aggressive soiling
• Removal of stains, discolouration and signs of rust with acidic agents.
The objects or liquids to be sonicated are placed in the sonication fluid in the
ultrasonic oscillating tank using an inset beaker to transfer the ultrasound. The
sonication fluid in the ultrasonic oscillating tank must contain an agent containing
surfactant.
For accessories suitable for direct and indirect sonication, see chapter
10 Accessories
5.2 Sonication fluid
A solution made from water and a special ultrasound agent is used as the sonica-
tion fluid. Drinking water or demineralised water can be used for the water.
Water without any additives is unsuitable for sonication. Use of demineralised
water without an ultrasound agent leads to increased erosion of the ultrasonic
oscillating tank.
The ultrasound agent used must foster cavitation and be biodegradable, easy to
dispose of, material-compatible and long-lasting. BANDELIN recommends ultra-
sound agents from the TICKOPUR, TICKOMED and STAMMOPUR product ranges
from DR. H. STAMM GmbH.
• Telephone advice: +49 30 76880-280
• Internet: www.dr-stamm.de
Observe the information on dosing provided by the ultrasound agent manufac-
turer. Please refer to the dosing table for the required quantities of ultrasound
agent and water. See chapter
9 Dosing table
.
You can calculate the quantities yourself in the same way as the following exam-
ple:
10 l ready to use solution, 2.5%: