Some Information about Flow Meters and Their Functions An air flow meter is a device that is used basically to measure the flow of air passing through a pipe or tube. Usually used in vehicles, the air flow meter can determine the amount of air that enters the engine at a particular period. A car’s smooth function is ensured and regulated by using an air flow meter device. There are different range of settings and features of this air flow meter device that one can choose to fit the purpose. An air flow meter device has some necessary functions and features. Its first function is to calculate the speed of the flow. This means the device has the capability to calculate the quantity of gas present in the tube while the flow meter gives information as to the speed of the flow.