FIELD: physics.
SUBSTANCE: measuring system has at least one temperature sensor, at least one pressure sensor, at least one flow sensor, as well as a measuring electronic unit at least temporarily connected to at least the temperature, pressure and flow sensors. The measuring electronic unit is configured to generate, at least temporarily, one, particularly digital, measured density value (Xp) through a measuring signal of temperature, pressure and flow. The point where pressure is measured lies either downstream or upstream from where temperature is measured. The inner diameter (D2) of the process pipeline at the point where pressure is measured is greater than inner diameter (D3) at the point where temperature is measured or the inner diameter (D3) of the process pipeline at the point where temperature is measured is greater than its inner diameter (D2) at the point where pressure is measured.
EFFECT: high accuracy of measuring thermodynamic state variables.
45 cl, 4 dwg
