Patent ID: 6845663

Claim:
A method for determining and/or monitoring a predetermined fill level of a medium in a container or for establishing a density of a medium in the container, with a device including an oscillation-capable unit, the method comprising the steps of: placing the oscillation-capable unit at one of: the height of the predetermine fill level and immersed down to a defined immersion depth in the medium; exciting the oscillation-capable unit to oscillate by means of an exciting oscillation; establishing an influence of viscosity affecting an oscillating frequency of the oscillation-capable unit; and correspondingly compensating for the influence of viscosity for one of: affecting the oscillating frequency in the determination of the fill level, and determining the density of the medium in the container, wherein one of an attainment of the predetermined fill level is recognized, as soon as the oscillation-capable unit oscillates with an oscillation frequency that shows a predetermined frequency change relative to an exciter frequency, and the density of the medium is established on the basis of the oscillation frequency of the oscillation-capable unit.