| abstract |
The invention relates to a method and a device for overfill protection for monitoring a refueling operation of a tank (3) with a foam-prone liquid, such as liquid gas. In this case, the tank (3) is connected to a measuring container (9, 11) having a sensor (27, 29) such that the sensor (27, 29) indicates a signal when a predetermined tank filling level is reached. The measuring container (9, 11) is equipped with an emptying device (35), which is designed and controlled such that between at least two successive measurements by means of the sensor (27, 29) the measuring container (9, 11), for example with compressed air is emptied. Only when the sensor (27, 29) emits the signal in at least two successive measurements, between which the measuring container (9, 11) is emptied, is it reported that a predetermined tank filling level has been reached. |