Flow measurement refers to the process of measuring the volume or mass of a fluid that is flowing through a pipe or other channel. There are a variety of different techniques and technologies that can be used for flow measurement, depending on the type of fluid being measured and the specific application.
For liquids, common techniques for flow measurement include:
Positive displacement meters
These meters measure the volume of liquid that passes through them by using a known volume chamber that is filled and emptied as the liquid flows through.
Velocity meters
These meters measure the speed at which the liquid is flowing and use this information to calculate the flow rate. Examples include orifice plates, venturi tubes, and pitot tubes.
For gases, common techniques for flow measurement include:
These meters measure the speed at which the gas is flowing and use this information to calculate the flow rate. Examples include orifice plates, venturi tubes, and pitot tubes.
Mass flow meters
These meters measure the mass of the liquid flowing through them per unit time and use this information to calculate the flow rate. Examples include Coriolis mass flow meters and thermal mass flow meters.