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Anybody knows bout pressure values at the earth's surface and a vacuum? in PSIA, PSIG, atmospheres, In Hg...?

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Anybody knows bout pressure values at the earth's surface and a vacuum? in PSIA, PSIG, atmospheres, In Hg...?

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  1. Mean pressure at sea level is 1 Atm. That's about 14.7 psi absolute, 0 psi gauge and about 760mm Hg.

    In a vacuum these would be 0 Atm, 0 PSIA and 0 mm Hg. Since a vented pressure gauge measures relative to its ambient pressure, it would also read 0 psi.

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