Flow measurement

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Flow measurement is the quantification of bulk <a href="/facts/Fluid/tMQ46Tmz">fluid</a> movement.  Flow can be measured using devices called flowmeters in various ways. The common types of flowmeters with industrial applications are listed below:
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<ul><li>Obstruction type (differential pressure or variable area)</li>
<li>Inferential (turbine type)</li>
<li>Electromagnetic</li>
<li><a href="/facts/Positive_displacement_meter/7fI47JEQ">Positive-displacement flowmeters</a>, which accumulate a fixed volume of fluid and then count the number of times the volume is filled to measure flow.</li>
<li>Fluid dynamic (vortex shedding)</li>
<li>Anemometer</li>
<li><a href="/facts/Ultrasonic_flow_meter/goX0Gzzw">Ultrasonic flow meter</a></li>
<li><a href="/facts/Mass_flow_meter/NBmMBXRb">Mass flow meter</a> (<a href="/facts/Coriolis_force/SqCyUY6d">Coriolis force</a>).</li></ul>
<p>Flow measurement methods other than positive-displacement flowmeters rely on forces produced by the flowing stream as it overcomes a known constriction, to indirectly calculate flow. Flow may be measured by measuring the velocity of fluid over a known area. For very large flows, tracer methods may be used to deduce the flow rate from the change in concentration of a dye or radioisotope.
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Flow measurement open-in-new

Flow measurement