Abstract: A vehicle fuel level sensor comprising a hollow cylindrical body housing a sliding float, the position of which is determined by the fuel level in the fuel tank. The sensor also comprises a filter surrounding as portion of the side wall of the cylindrical body, close to the bottom wall of the same, so as to define, with the side wall, a first chamber; and a plate for supporting the filter and connected to the bottom wall of the hollow cylindrical body so as to define, with the bottom wall, a second chamber communicating directly with the first chamber and, via a through hole in the bottom wall, with the inside of the hollow cylindrical body.

Abstract: A device (1) for transmitting rotary motion from a first to a second shaft and for measuring the angular speed of said rotary motion, comprising a first and second pulse generator associated respectively with said first and second shaft, and governing, by means of a processing circuit, the operation of an electric motor (2) of direct current type one shaft (7) of which is torsionally coupled to said second shaft; and a speed indicator comprising means (25) sensitive to magnetic field variations is described. The main feature of this device (1) is that said second pulse generator comprises a magneto-electrical transducer (32), and a permanent magnet (9) is torsionally coupled to said second shaft; said magnet (9) determining the activation either of said magneto-electrical transducer (32), or of those means (25) of said speed indicator which are sensitive to magnetic field variations.