Abstract: A method, and a corresponding measuring system, for highly accurate determining of a temperature-normalized fill volume of a fill substance in a container includes measuring the fill level of the fill substance, averaging fill substance temperatures, and determining the fill volume using the measured fill level and a linearization model for the particular container. The normalization of the fill volume to a defined standard temperature occurs based on the ascertained fill volume, the averaged fill substance temperature, and the temperature dependent expansion coefficient of the fill substance. The averaged fill substance temperature is calculated based on a plurality of temperature values measured in the container interior in mutually adjoining height segments.

Abstract: The application discloses a method for determining density of a medium in a tank of a hybrid tank measurement system having at least two pressure sensors for determining pressure measurement values, wherein the pressure sensors are specified for mutually differing pressure measuring ranges each having an absolute measurement error, and wherein the method includes: registering at least one pressure measurement value with the two pressure sensors; forming a pressure difference magnitude from the registered pressure measurement values; comparing the pressure difference magnitude with a threshold value; and determining the density of the medium based on the comparing of the difference values with the threshold value.