Werner Alber: Flow control measures the volume of a gas per unit of time and reacts sensitively to pressure and temperature fluctuations. Mass flow control, on the other hand, records the actual gas mass and ensures constant values regardless of the ambient conditions – ideal for precise applications such as in medical technology or semiconductor production.
In short: While flow control focuses on volume, mass flow control ensures that the same mass of gas always flows through the system, regardless of the external influences.