Mass Flow Controller - Mass Flow Controller Importer, Manufacturer, Distributor, Supplier, Trading Company, Pune, India

Mass Flow Controller
Working Principle of Mass Flow Controller

First, the turbulent gas flow enters a unique internal restriction known as a Laminar Flow Element (LFE). The LFE forces the gas molecules to move in parallel paths along the entire length of the passage. This creates streamline flow, or laminar flow, for the entire range of operation of the device.
Now we measure the differential pressure drop within the laminar region and apply the Poiseuille Equation, which quantifies the linear relationship between pressure drop and flow. This provides us with a volumetric flow rate.
Then we measure gas temperature and pressure to determine density effects per Ideal Gas Laws.
Finally, the microprocessor corrects the volumetric flow rate to a standard pressure and temperature (STP) with density change compensations to provide a mass flow rate. This technique creates a unique Internally Compensated Laminar flow device.