US Patent 10424930 Level measuring device having a serial arrangement of functional units

There is provided a level measuring device including at least two electrical circuits connected in series with respect to an external power supply of the level measuring device. A decoupling circuit is disposed between the electrical circuits and is configured to distribute available power between the two electrical circuits according to requirements. At least the second electrical circuit includes an energy store as an energy buffer configured to equalize a fluctuating energy consumption of the second electrical circuit such that a start time of the level measuring device can be shortened.