Measuring arrangement designed to measure the density of flowable media, comprising: a fluid path designed to conduct a medium; a pump , which is arranged in the fluid path and is designed to induce a volume flow of the medium in the fluid path , wherein the volume flow is a defined volume flow; a differential pressure measuring arrangement designed to measure a drop in pressure due to the volume flow of the medium between a first pressure tapping point and a second pressure tapping point in the fluid path ; a density meter with at least an oscillator, which has at least a measuring tube which can vibrate and is designed to conduct the medium, with at least an exciter arrangement to generate vibrations of the measuring tube, and with at least a sensor arrangement to measure at least a resonance frequency of the oscillator, wherein the measuring tube or the measuring tubes of the at least one oscillator is/are arranged in the fluid path, wherein the resonance frequency of the oscillator depends on the density of the medium and the medium's viscosity; an evaluation unit , which is designed to determine the density of the medium, characterized in that the evaluation unit is designed to determine the density of the medium on the basis of the volume flow, the drop in pressure, which depends on the volume flow, and at least the resonance frequency of the oscillator, wherein the evaluation unit is designed to first determine the viscosity of the medium on the basis of the volume flow and the drop in pressure, which depends on the volume flow, and then to determine the density of the medium on the basis of this determined viscosity and at least the resonance frequency of the oscillator. a fluid path designed to conduct a medium; a pump , which is arranged in the fluid path and is designed to induce a volume flow of the medium in the fluid path , wherein the volume flow is a defined volume flow; a differential pressure measuring arrangement designed to measure a drop in pressure due to the volume flow of the medium between a first pressure tapping point and a second pressure tapping point in the fluid path ; a density meter with at least an oscillator, which has at least a measuring tube which can vibrate and is designed to conduct the medium, with at least an exciter arrangement to generate vibrations of the measuring tube, and with at least a sensor arrangement to measure at least a resonance frequency of the oscillator, wherein the measuring tube or the measuring tubes of the at least one oscillator is/are arranged in the fluid path, wherein the resonance frequency of the oscillator depends on the density of the medium and the medium's viscosity; an evaluation unit , which is designed to determine the density of the medium, characterized in that the evaluation unit is designed to determine the density of the medium on the basis of the volume flow, the drop in pressure, which depends on the volume flow, and at least the resonance frequency of the oscillator, wherein the evaluation unit is designed to first determine the viscosity of the medium on the basis of the volume flow and the drop in pressure, which depends on the volume flow, and then to determine the density of the medium on the basis of this determined viscosity and at least the resonance frequency of the oscillator. <EOS>