Patent ID: 6915692

Claim:
A level-sensor device for a liquid-fuel tank, particularly for a system of LPG supply to the internal-combustion engine of a motor vehicle, comprising: a floating member, which can move vertically within the tank following upon variations of level of the fuel in the tank; and transducer means sensitive to the movement of the floating member, for issuing an electrical signal indicating the position of the floating member in the tank, wherein: the floating member has a body vertically slidably guided within the tank along a vertical guide column; said transducer means comprise a vertically aligned series of electrical magnetic-actuation switches of a reed-relay type arranged in said column adjacent to the floating member; the body of the floating member comprises magnetic means designed to activate selectively one or more of the aforesaid electrical magnetic-actuation switches according to its position with respect to the aligned series of said electrical magnetic-actuation switches, and wherein said electrical magnetic-actuation switches are arranged adjacent each other with a small pitch along top and bottom portions of said column and a larger pitch along a middle portion said column, to determine when the liquid has reached a minimum threshold value or a maximum threshold value.