Liquid dispensing device comprising at least one reservoir within which a holding chamber for a liquid is defined, said chamber being capable of communicating with the outside of the reservoir through an outlet opening for liquid dispensing; a ram movable within the holding chamber and capable of assuming a forward end-of-stroke position, in which the ram engages a seat formed at the outlet opening and blocking fluid communication between the holding chamber and the outside of the holding chamber , and a backward end-of-stroke position in which the ram is removed from the seat , wherein a variable volume working chamber capable of communicating with the holding chamber is defined between the ram and the seat ; and non-return valve means arranged at the outlet opening and downstream of the seat , said non-return valve means being open or closed when difference between fluid pressure upstream thereof and fluid pressure downstream thereof is higher or lower than a predetermined value, respectively; wherein during the stroke of the ram from the forward end-of-stroke position to the backward end-of-stroke position the liquid flows from the holding chamber to the working chamber , and during the stroke of the ram from the backward end-of-stroke position to the forward end-of-stroke position the liquid is compressed within the working chamber and, upon opening of the non-return valve means , is dispensed out from the working chamber through the outlet opening , wherein compression of the liquid inside the chamber causes the opening of the non-return valve means ; and wherein the device further comprises actuating means arranged at the outside of the reservoir and capable of contactlessly controlling motion of the ram , wherein a permanent magnet is fixed to the ram , and wherein the actuating means are capable of controlling motion of the ram by means of magnetic polarity inversion. at least one reservoir within which a holding chamber for a liquid is defined, said chamber being capable of communicating with the outside of the reservoir through an outlet opening for liquid dispensing; a ram movable within the holding chamber and capable of assuming a forward end-of-stroke position, in which the ram engages a seat formed at the outlet opening and blocking fluid communication between the holding chamber and the outside of the holding chamber , and a backward end-of-stroke position in which the ram is removed from the seat , wherein a variable volume working chamber capable of communicating with the holding chamber is defined between the ram and the seat ; and non-return valve means arranged at the outlet opening and downstream of the seat , said non-return valve means being open or closed when difference between fluid pressure upstream thereof and fluid pressure downstream thereof is higher or lower than a predetermined value, respectively; wherein during the stroke of the ram from the forward end-of-stroke position to the backward end-of-stroke position the liquid flows from the holding chamber to the working chamber , and during the stroke of the ram from the backward end-of-stroke position to the forward end-of-stroke position the liquid is compressed within the working chamber and, upon opening of the non-return valve means , is dispensed out from the working chamber through the outlet opening , wherein compression of the liquid inside the chamber causes the opening of the non-return valve means ; and wherein the device further comprises actuating means arranged at the outside of the reservoir and capable of contactlessly controlling motion of the ram , wherein a permanent magnet is fixed to the ram , and wherein the actuating means are capable of controlling motion of the ram by means of magnetic polarity inversion. <EOS>