Air Flow Meter Types

Ultrasonic flow meter types.

Air flow meter types.

Depending on the type of application the air flow meter is made as a hot wire air flow meter a vane air flow meter a cup anemometer a pitot tube air flow meter or a pocket weather flow meter all of which can measure air velocity as well as air pressure. Variable area flowmeters rotameters. Sometimes if the spring is tensioned too tightly it can restrict the incoming air and it would cause the intake air speed to increase when not opened fully. Some can even detect the wind direction.

As mentioned earlier an ultrasonic flow meter measures using one of two methods doppler or transit time. Pd flow meters include piston meters oval gear meters nutating disk meters rotary vane type meters etc. Turbulent flow occurs when there is an irregularity such as a disruption in the surface across which the fluid is flowing which alters the direction of movement. An introduction to different types of fluid flowmeters orifices venturies nozzles rotameters pitot tubes calorimetrics turbine vortex electromagnetic doppler ultrasonic thermal coriolis.

Like any fluid air may exhibit both laminar and turbulent flow patterns. Vendors might offer you both types in their portfolios or only one. In this video explained abouttypes of flow meterstheir working principleadvantagesdisadvantagesselection guidesubscribe for upcoming videosabout this channel. The flow rate indicated by the position of the float relative to a calibrated scale.

Laminar flow occurs when air can flow smoothly and exhibits a parabolic velocity profile. Of course both options have good and bad points so the ideal choice will depend on an application. Hot wire air flow meter. Hot wire air flow meter.

A free moving float is balanced inside a vertical tapered tube. Positive displacement flow meters are known for their accuracy. There are four main types of air flow meters. The moving vane flap type air flow meters bosch l jetronic and early motronic efi systems or hitachi actually measure air volume whereas the later hot wire and hot film air mass meters measure the mass of air flow.

Pitot tube air flow meter. They are commonly used in the transfer of oils and fluids like gasoline hydraulic fluids as well as in home use for water and gas applications. The flap type meter includes a spring which returns the internal flap to the initial position. Usually when people explain the doppler effect they use an ambulance as.

As the fluid flows upward the float remains steady when the dynamic forces acting on it are zero.