Device for determining and / or monitoring a predetermined filling level in a container

摘要: The device for determining and/or monitoring a predetermined filling level in container has two oscillatory rods secured with spacing adjacent one another on diaphragm the edge of which is connected to screw-in part. By means part so screw-threaded aperture wall at height be detected that project into container. At side remote from bridging member held spaced by flexurally elastic rod-shaped supports. Each rod shaped supports rigidly end an rod. Between and there held, preloading diaphragm, transducer column comprising stack piezoelectric excitation reception transducer. transducers are via amplifier self-excitation circuit mechanical system excited its natural resonance frequency. An evaluation responds changes frequency oscillations initiates indicating switching operations accordance such changes.