Patent ID: 8370098

Claim:
A measuring system for measuring a density of a flowing medium in a process line along a flow axis of the measuring system and said flowing medium being variable as regards a thermodynamic state, said measuring system comprising: at least one temperature sensor placed at a temperature measuring point, said at least one temperature sensor reacting to a local temperature of said flowing medium and said at least one temperature sensor delivering at least one temperature measurement signal influenced by the local temperature of said flowing medium; at least one pressure sensor placed at a pressure measuring point, said at least one pressure sensor reacting to a local pressure of said flowing medium and said at least one pressure sensor delivering at least one pressure measurement signal influenced by the local pressure in said flowing medium; and measuring electronics communicating, in each case, with at least said at least one temperature sensor and said at least one pressure sensor, wherein: with application of the temperature measurement signal and at least the pressure measurement signal, said measuring electronics ascertains a provisional density measured-value representing a density which said flowing medium only shows at a virtual density measuring point; and with application of the provisional density measured-value and at least one density correction value ascertained at run-time, said measuring electronics produces at least one density measured-value differing from the provisional density measured-value and representing instantaneously more accurately than the provisional density measured-value a local density, which said flowing medium shows at the virtual density measuring point; said density correction value corresponding with a spatial variance of a thermodynamic state variable of the flowing medium and/or with an instantaneous spatial variance of the Reynolds number of the flowing medium; and said density correction value depending on the local temperature of said flowing medium at the temperature measuring point and on a flow velocity of said flowing medium.