Differential Pressure Flow meters One of the most commonly used fluid flow measurement technology is by reading the pressure loss across a pipe restriction. This pressure drop can be achieved by a wide variety of flow sensors with different geometric shapes. These different flow sensors have their various strengths and weaknesses. These flow meters are also called ‘’head’’ meters. Examples of flow sensors using differential pressure technology as basis for flow measurement include: (a) Orifice plate (b) Flow nozzle (c) Venturi tube (d) Rotameters (e) Pitot tubes As a fluid passes through a restriction in a pipe, it accelerates, and the energy for this acceleration is obtained from the fluid’s static pressure. Consequently, the line pressure drops at the point of constriction. Part of the pressure drop is recovered as the flow returns to the unrestricted pipe.
Posted on: Mon, 20 Oct 2014 12:34:06 +0000
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