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Overunity Machines Forum



Flow Meters (Gas, Liquid)

Started by wizkycho, July 31, 2008, 04:46:45 AM

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wizkycho

July 31, 2008, 04:46:45 AM
Hi all !

  I'm in need of Analog Flow Meter 0.5 - 5 LPM or simmilar, anyone can suggest a supplier
(preferably near Croatia to lower down postage cost)

usage: for hydrogen production experiments

Thanks
Wiz

Paul-R

#1
July 31, 2008, 07:31:26 AM
Quote from: wizkycho on July 31, 2008, 04:46:45 AM
Hi all !
I'm in need of Analog Flow Meter 0.5 - 5 LPM or simmilar, anyone can suggest a supplier
(preferably near Croatia to lower down postage cost)
Thanks
Wiz
This could be the basis for a cheap DIY unit:
http://www.autoshop101.com/forms/h34.pdf
Paul.

Yucca

#2
July 31, 2008, 08:27:57 PM
Hi Wiz,

I've thought of how to make my own air flow sensor for HHO, here's my favourite idea:

Make a bubbler unit out of clear plastic tube make it say 20cm tall and 1cm diameter.

Get hold of two IR LEDs, use one as a transmitter and the other as a receiver (yes, normal LEDs work as photodiodes when forward biased with low voltage) and have them looking at each other through the bubbler.

When there is no bubble between them the IR will get attenuated heavily by the water. When a bubble passes, you will get a little blip on the receiver LED, condition this blip using an OP-amp so that you get definite low-high-low pulse and then you could feed into a computer.

For analog voltage output you could collect the conditioned blips in a capacitor that slowly bleeds through a resistor.

Of course this is all pie in the sky ::) and it would take some experimentation to get it all setup correctly, but  I think it would stand a good chance of working and as you need a bubbler anyway it kills two birds with one stone.

Best of luck with your HHO ventures.

FosterVS

#3
August 08, 2008, 10:18:05 AM
Quote from: wizkycho on July 31, 2008, 04:46:45 AM
Hi all !

  I'm in need of Analog Flow Meter 0.5 - 5 LPM or simmilar, anyone can suggest a supplier
(preferably near Croatia to lower down postage cost)

usage: for hydrogen production experiments

Thanks
Wiz

I too have been searching for something similar, instead of the mess of a bucket of water, 1 liter bottle and a hose.
I bought one of these, it's on the way now, they have other ones that measure higher as well:

Oxygen Liter Flow Meter Measures 0 - 2 1/2 LPM
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=190242855841
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