Device and method for dosing small amounts of liquid

A method for dosing small amounts of liquid, said method comprising the following steps:

• providing a microdosage device comprising:
• a media reservoir used for accommodating a liquid to be dosed;
• a nozzle connected via a connecting channel to the media reservoir and adapted to be filled via said connecting channel with the liquid to be dosed;
• and a drive unit for applying, when actuated, to a liquid contained in the media reservoir and in the nozzle a force of such a nature that a substantially identical pressure will be exerted on said liquid contained in the media reservoir and in the nozzle, wherein flow resistances of the connecting channel and of the nozzle are dimensioned such that, in response to an actuation of the drive unit, a volumetric flow in the connecting channel will be small in comparison with a volumetric flow in the nozzle, said volumetric flow in the nozzle causing an ejection of the liquid to be dosed from an ejection opening of the nozzle;
• filling the least one nozzle via the connecting channel with a liquid to be dosed from the media reservoir, said connecting channel establishing a fluid connection between said nozzle and said media reservoir;
• and
• applying to the liquid contained in the media reservoir and in the nozzle a force of such a nature that a substantially identical pressure will be applied to the liquid contained in the media reservoir and in the nozzle, so that, due to the dimensioning of flow resistances of the connecting channel and of the nozzle, the volumetric flow in the connecting channel will be small in comparison with the volumetric flow of the liquid in the nozzle so as to eject an amount of the liquid to be dosed from an ejection opening of the nozzle.