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A Pitot tube flow meter is a differential pressure device that measures the velocity of a gas based on Bernoulli’s principle. It uses two pressure points. The stagnation port captures the impact pressure of the flowing gas, while the static port records the static pressure inside the pipe. The difference between these two pressures gives the differential pressure, which increases with higher gas velocity.

To determine the mass flow rate, the measured differential pressure is combined with temperature and system pressure. These parameters define the density of the gas, which is essential for converting velocity into mass flow. With this approach, a Pitot tube flow meter provides a reliable method to measure mass flow in compressed air and gas systems, supporting stable operation and consistent consumption monitoring.