Abstract: A cleaning device cleans cell accumulations or sediment or cell accumulations with sediment in cuvettes of a microtiter plate. A liquid container supplies a cleaning liquid to a plurality of charging pipes with a pump. The charging pipes dropwise feed the cleaning liquid to the cuvette. Preferably the charging pipes are obliquely disposed relative to the walls of the cuvettes and have a cross-sectional expansion at their discharge openings to enhance the formation of drops. A plurality of pipettes are also provided for suctioning off the cleaning liquid provided to the cuvettes by the charging pipes. The pipettes are capable of having the immersion depth thereof in the cuvettes controlled so as to follow the level of the cleaning liquid down in the cuvettes.

Abstract: A dispensing device enables a liquid to be delivered to the cavities of a titration plate. In order to obtain optimum quality of delivery, charging pipes lead from a distributing pipe first upwards, and then, after passing a bypass area, downwards to a discharge area.

Abstract: An apparatus for washing and rinsing a titration plate having a plurality of cavities includes a treatment station for supporting and retaining a titration plate to be washed and rinsed. A washing plate has a lower surface and is positioned above the treatment station. A titration plate to be washed and rinsed is supplied to the treatment station below the washing plate, with the cavities of the titration plate directed upwardly. The lower surface of the washing plate and the upper surface of the titration plate are brought into sealing contact. A plurality of nozzles are at the lower surface of the washing plate and extend into respective cavities of the titration plate. The washing plate has formed therein a plurality of bores surrounding respective nozzles, thereby defining respective annular gaps. At least one discharge channel is formed in the washing plate and is connected to the annular gaps.