Abstract: Disclosed is a device for the measurement of the level or volume of a liquid contained in a reservoir of the type comprising a casing that houses an element defining two generally vertical, separate, electrical tracks, at least one of which is electrically resistant, and a float that is capable of following the level of the liquid and bears a slider capable of connecting the two tracks, said device comprising at least one spacer that connects the housing and the element defining the tracks, at least two floats placed on either side of the spacer and means ensuring that at least the slider of the upper float is separated from at least one of the tracks when it reaches the lower final stage of its movement adjacent to the spacer.