Tiny vacuum pump

On Wed, 21 Jan 2004 03:08:30 GMT, "Greg Milligan"
wrote:

Check Fisher Scientific under "aspirator".

yes, https://www1.fishersci.com/Coupon?gid=109471&cid=1328 looks
exactly like what I remember. The $63.24 looks about 10x what I think
it would be worth to Jim ... is there a yellow tag?

"GeorgeB" wrote in message
.. .
On Fri, 16 Jan 2004 08:41:07 -0800, Jim Weir wrote:

Does anybody have an idea on how to make a tiny little vacuum pump on the
order
of an aquarium pump or so that will draw just a few inches of water?
Preferably
110, but I can rig up a 12 volt supply if necessary.

Thoughts?

When I was in college, the chem labs used a venturi on water faucets
to create a vacuum for filtration. I've tried Google to show where to
get them, and failed.

Just a little attachment with a side barbed fitting ... good vacuum
levels, CHEAP, and appropriate for one who utilizes Bernoulli in other
ways ...

now where do I get it?

If you've got shop air, try looking for either a Vac Cubes or Piab venturi-type
vac injector. Both companies make some that are under 1" sq. and are used to
pick up post cards, tec. on factory machines. Should be in the $20 range.
You'll probably find them in your area at an industrial pneumatics supplier.

Harry