Patent ID: 8010312

Claim:
A measuring system for measuring a density of a medium that is variable as regards a thermodynamic state and that flows in a process line along a flow axis of the measuring system, said measuring system comprising: at least one temperature sensor placed at a temperature measuring point (M ∂ ), said temperature sensor reacting to a local temperature, θ, of a medium, and delivering at least one temperature measurement signal (x ∂ ) influenced by the local temperature of the medium; at least one pressure sensor placed at a pressure measuring point (M p ), said pressure sensor reacting to a local pressure, p, of the medium, and delivering at least one pressure measurement signal (x p ) influenced by the local pressure, in the medium; at least one flow sensor placed at a flow measuring point, reacting to a local flow parameter of the medium, and delivering at least one flow measurement signal influenced by the local flow parameter; and measuring electronics connected to and communicating, in each case with the temperature sensor, the pressure sensor and the flow sensor, and calculating at least one density measured-value (X ρ ) based on the temperature measurement signal, the pressure measurement signal, and the flow measurement signal, said at least one density measured-value (X ρ ) representing, instantaneously, a local density, ρ, of the medium at a virtual density measuring point (M′ ρ ).