Applications of pressure measurement

Accurately measuring liquid, gas, and steam pressure is a basic requirement for many industrial processes to operate safely, efficiently, and with optimum quality control. In addition to directly measuring pressure values, pressure measurements can be used to determine or infer flow rates, fluid levels, product density, and other parameters. As a result, many plants rely on pressure-measurement devices to get required field measurements.

Some example applications using pressure or differential measurements are:

 flow rate through a pipe

 level of fluid in a tank

 density of a substance

 interface between two or more liquids in a tank

For example, if a constriction, such as an orifice plate, is placed in a pipe, pressure will drop in a predictable way. By measuring the pressure in the pipe both before and after the orifice plate, the rate of flow through the pipe can be calculated.

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