Quote:
Originally Posted by sickpuppy318
HoLY Crap i just realized something. its a stick type guage, ambiant pressure pushes back on the stick, right?
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A spring retracts the stick. Ambient atmospheric pressure could not do the job since that pressure exists on both sides of the plunger when the gage is on the shelf. The only way to counter that would be to put a perfect vacuum acting against one wide of it and that would last a matter of seconds or minutes at best on a $3 gage.