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How is vacuum usually measured and what is a Torr, Micron, mm HG?

April 26, 2017Hg measured Micron mm torr usually vacuum

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How is vacuum usually measured and what is a Torr, Micron, mm HG?

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One standard atmosphere at standard conditions will support a column of mercury 29.92″ high. This is where the linear measurement in vacuum comes into play. 29.92″ can be also measured in mm Hg (760mm = 29.92″) and microns (760,000 microns = 760 mm = 29.92″).