Filling level measuring device for motor vehicle fuel tank has circuitry and electroacoustic transducer mounted on acoustic guide body

摘要

The device includes a piezoceramic electroacoustic transducer (3) provided with an acoustic guide body (2) mounted on the outside wall of the tank. The acoustic guide body acts as a carrier for both the transducer and an evaluation and control circuit (7). The acoustic guide body has a recess (4) in the region adjoining where the transducer is arranged.