Pressure measurement refers to the process of determining the force exerted by a fluid (liquid or gas) per unit area on a surface. It is a critical parameter in various fields, including engineering, meteorology, medicine, and manufacturing.
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A pressure measurement determines pressure relative to a specified reference using an instrument such as a manometer or pressure transducer. Gauge pressure, absolute pressure and differential pressure require different references; measurement calibration and measurement uncertainty determine how the reading can be interpreted.