Abstract: A safety device for motor vehicle includes a microprocessor having set therein a tilt angle default value, a controller coupled with the ignition device and brake device of the motor vehicle, an angle sensor mounted to the body of the motor vehicle and an operator sensor installed in the directional control device. The microprocessor activates the controller to turn off the ignition device and to actuate the brake device if the motor vehicle is tilted excessively or when the operator goes out of the sensing range of the operator sensor, avoiding danger.

Abstract: An fuel level detector includes a substrate fixedly mounted inside an fuel tank, a narrow elongated first electrode arranged on the substrate and kept in contact with the fuel oil in the fuel tank, a second electrode formed of a plurality of electrode elements arranged on the substrate at different elevations in a parallel manner relative to the first electrode, and a sensing circuit formed of a plurality of capacitive sensors that are respectively electrically connected with the electrode elements of the second electrode for detecting the level of fuel oil in the fuel tank subject to a rise in capacitance value between the first electrode and one electrode element of the second electrode.