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Figure 3.6. Liquiflow sealed gear pump.
3.4.3 Mass Flow Meter The mass flow meter is a Micro Motion mass flow sensor (model CMFS010M)
connected to a 1700R model transmitter (see Figure 3.7). It has an accuracy of ±0.05% of
the flow rate. The maximum flow rate it can measure is 108 kg/hr. The mass flow meter
operates on the principle of the Coriolis effect. The fluid is passed through a U-shaped
tube in the mass flow sensor which is initially vibrating at a given frequency. When the
fluid flows through the U- shaped tube due to its angular velocity and inertia causes the
tube to twist. The twisting of the two legs of the U-shaped tube is sensed by an
electromagnetic sensor in terms of a phase change. This phase change is measured in
terms of mass flow.