Coriolis measurement principle
The Coriolis principle within a Coriolis flow sensor (which, according to its design, may have one or two internal measurement tubes). Fluid flows through measuring tubes that are constantly excited to oscillate at their resonant frequency. Any change in the density of the fluid produces a corresponding change in the resonance frequency of the entire vibratory system (measuring tube and fluid).
The resonant frequency, therefore, is a function of the density of the fluid: the higher the density, the lower the resonant frequency. In this way, by measuring the frequency of the system we can determine the density of the fluid.
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