flowmeter Endress Hauser

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The measuring principle is based on the controlled generation of Coriolis forces. These forces are always present when both translational and rotational movements are superimposed.
FC = 2 · Δm (v · ω)
FC = Coriolis force
Δm = moving mass
ω = rotational velocity
v = radial velocity in rotating or oscillating system
The amplitude of the Coriolis force depends on the moving mass Δm, its velocity v in the system, and thus on
the mass flow. Instead of a constant angular velocity ω, the Promass sensor uses oscillation.
In the sensor, two parallel measuring tubes containing flowing fluid oscillate in antiphase, acting like a tuning
fork. The Coriolis forces produced at the measuring tubes cause a phase shift in the tube oscillations