Insert cups are used (indirect sonication) when using chemically aggressive liquids (e.g. TICKOPUR J 80 U), for the removal of chemically aggressive or abrasive soiling or for sonication of sample liquids. Since nothing must be placed on the bottom of the ultrasonic bath, BANDELIN offers suitable plastic insert beakers with Lids. Please note that to transfer the ultrasound to the insert vessel the surface tension of the water must be reduced and therefore a cleaning solution (e.g. TICKOPUR R 33 - 3%) must be used as coupling liquid / contact liquid. Insert cups are used (indirect sonication) when using chemically aggressive liquids (e.g. TICKOPUR J 80 U), for the removal of chemically aggressive or abrasive soiling or for sonication of sample liquids. Since nothing must be placed on the bottom of the ultrasonic bath, BANDELIN offers suitable plastic insert beakers with Lids. Please note that to transfer the ultrasound to the insert vessel the surface tension of the water must be reduced and therefore a cleaning solution (e.g. TICKOPUR R 33 - 3%) must be used as coupling liquid / contact liquid.