Filling level sensor and method for measuring filling level

A fill-level measuring device for measuring a fill level of a fill substance in a container, which, following a single commissioning, can be used in a plurality of applications. The fill-level measuring device includes: A measuring unit, which serves to produce a measurement signal dependent on the fill-level; a memory, in which parameter sets for different applications are stored; and an evaluating unit, which serves for selecting a parameter set, for deriving, on the basis of this parameter set, the fill level from the measurement signal, and for making such fill level available for further processing, evaluation and/or display.