8S3B

The measuring system operates on the Coriolis principle. The Coriolis force acts on an object moving in a straight line within a rotating system. Fc = 2 · ∆m (ν · ω) Fc = Coriolis force ∆m =mass of the moving object ω =angular velocity ν = radial velocity of the object in the rotating or oscillating system The magnitude of the Coriolis force depends on the mass \(\Delta m\) of the moving object and its radial velocity v, namely the mass flow rate. Instead of a rotating system with constant angular velocity \(\omega\), the sensor adopts oscillating measuring tubes.Fluid flows through the sensor. Two parallel measuring tubes inside the sensor oscillate in antiphase, similar to a tuning fork. The Coriolis force generated within the measuring tubes creates a phase shift in tube oscillation: • At zero flow (fluid at rest), the two measuring tubes oscillate in‑phase with no phase difference. • Mass flow accelerates oscillation at the inlet of the measuring tubes and decelerates oscillation at the outlet, producing a phase shift.The higher the mass flow rate, the larger the phase shift. Electromagnetic phase sensors record the oscillation phase at the inlet and outlet of the measuring tubes. Antiphase oscillation of the two measuring tubes ensures system balance. The measuring principle is completely independent of temperature, pressure, viscosity, electrical conductivity and fluid‑specific properties.

Food and beverage industry applications

Promass S features an advanced hygienic design for food and beverage industry applications demanding high-grade cleanability. Its self-draining single-measuring-tube system enables measurement of sensitive fluids. Paired with a compact transmitter, Promass S 300 delivers flexible operation and convenient system integration: single-side wiring on the device, remote display and enhanced connection options. Integrated Heartbeat Technology ensures consistent process safety. • Measuring principle independent of fluid physical properties (e.g., viscosity and density) • Dedicated flowmeter for hygienic applications in food and beverage industries