I want to know if it is possible to measure the vacuum in a can after
it is being filled and sealed. let us say that you have a production
line of cans and you constantly need to check the quality of the
vacuum in the cans. does any company provide such an equipment? and at
what cost?

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Request for Question Clarification by hedgie-ga on 29 Mar 2006 08:37 PST

What kind of can?  Something like a beer can? Is it filled with something?

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Clarification of Question by moussari-ga on 30 Mar 2006 00:43 PST

The can that I am inquiring about is a can of Nuts. very similar to
the one you see for vegetables, and soup. it is commonly referred as
Easy Open Can!

well i dont know of any mechine but there sure r ways to find.
A company in jepan has hired people,who by tapping the can with a
spone and judging from the sound produced could tell the quality of
vacume,

Carbonated drinks  - including Hedgie's beer -  are under pressure in
sealed cans, unless quite cold.  A vacuum in the can would immediately
be offset by co2 from the liquid.  If the can warms or is shaken, the
pressure increases.

Aha!  Thanks.

I could envision something that held the can and had a suction cup
that sucked onto the middle of the lid, pulling up on it and measuring
lid's resistance.

But I don't know if it exists.