When we can manually measure the discharge flow rate,what for have we developed the concept of venturi meter or orifice metre?
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$\begingroup$ How would you manually measure the flow rate of a 3 metre diameter pipe with a flow rate of 4 m^3/s? How big is your bucket? $\endgroup$– Solar MikeJun 9, 2018 at 13:31
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$\begingroup$ @SolarMikeGot it!! $\endgroup$– ShwethaJun 9, 2018 at 13:54
2 Answers
Flow meters can also be used for high-precision applications. Imagine wanting to measure flow of gas, on the order of 0.1 sccm through a very small tube.
Flow measurement device is used where you cannot just put the output of a fluid in to a tank where you can measure the time and volume filled, it is used in conditions like flow of refrigerant liquid through a pipe, or a petroleum gas flow inside a pipe. and also it is not easy to measure flow of gas directly.
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1$\begingroup$ Additionally, many processes rely on continuous flow measurement for control, so timing how long it takes to fill a bucket isn’t feasible. $\endgroup$– MarkJun 15, 2018 at 18:34