I was disappointed in the size, it fits in my palm, not so impressive, but t he fact it has a 120v power cord instead of a USB wallbug power supply hints at something big inside. So, I gave it a try and it looks impressive. Here are the pics and a movie.
For the tests, I took coffee grounds and silt out of the french press and passed it through my 110mm buckner using three layered paper filters - two #2s and a cut brown coffee filter. It worked! Here’s what you see…
Pic #1 All the pieces including the 3 sheets of filter paper.
Pic #2 All three sheets wetted. The #2s went in first one at a time, then the brown 3rd sheet on top.
Pic #3 When using multiple sheets of filter paper, I use a can to press down the edges to prevent separation and leaks around the edges when pouring the liquid. Once suction starts, its safe to gently remove the can.
Pic #4 is a video showing the pump in operation.
Pic #5 is a view of the cake in the buckner
Pic #6 is the filter sheet pulled up for a better view.
Pic #7 is the filtered coffee.
Pic #8 shows how the hose was put together with segments of silicon tubing.
Looks pretty good, although I want to see this through a cake of powders. .Looks pretty impressive though through the #2 considering the price. Id say its a win especially if your just filtering through paper.
Nice trick with the can. My next test would be trying to suck some -40° ethanol through half an inch of celite. The difference in filtration speed between room temp and -40° is huge, so I think it would be a good test of your new pump. Sure looks convenient for small stuff being all tiny and oil free. I’ve always wondered about these little things, but figured they were pretty worthless. Thanks for testing for us!
No such equipment on hand (manometer) but I have been using it to pull winterize -30 ISO and its damn slow, but its better than gravity. Still looking for a low end vac I can recommend to home users.
