Abstract: Liquid level sensor comprising a rod (2) on which a first (4) and a second (5) resistance wire are wound helically and parallel, a float (3) which is displaceable along the rod and which comprises a contact element which has a first (11) and a seond (12) contact plate, which each make contact with one of the resistance wires (4, 5) respectively, and a circuit which runs through the resistance wires and the contact element and whose resistivity varies depending on the position of hte float along the rod, in which respect the resistance wire (4) is recessed in the rod in the area in which the resistance wire (5) bears against the contact plate (12) while the resistance wire (5) is recessed in the rod in the area in which the resistance wire (4) bears against the contact plate.