Abstract: The dispenser device of the invention comprises a liquid storage tank overlying an intermediate chamber partially filled with liquid. The top storage tank is fluidingly linked to the intermediate chamber, and a first valve controls the liquid flow under the gravity force from the top tank into the intermediate chamber. The intermediate chamber comprises on its bottom wall an outlet port for allowing liquid to be dispensed therethrough under the gravity force and under the pressure of the overlying liquid, the liquid flow through the chamber outlet port being controlled by a second valve. A small computer is linked to the first and second valves and to a float gauge floating on the liquid located inside the intermediate chamber. Thus, the computer detects by means of the float gauge any variation of the level of liquid inside the intermediate chamber. In use, the data concerning the precise quantity of liquid which is desired is entered into the computer.