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Air pressure meter

Air pressure meter

Air pressure meters are measurement devices used to report absolute and/or differential air pressure. The output of the meters are typically delivered in a number of standard units including psi, mm HG, inches of H2O, millibars, and bars. Air pressure meters almost always include two ports - one to measure the air pressure of interest and one to provide a reference pressure, whether ambient air pressure or otherwise. (0615 - EngNet)