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Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > O2 Results from my new O2 meter!
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Old 04-04-2012, 01:13 AM   #11
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About how much of a flow do you inect with the pure o2? Vigorous, or just so its bubbling on the surface?
Great question!
I would say that I get an even bubbly flow, not so that the surface is churning,
and I do move my wand in a circular motion while oxygenating. I would call it a medium flow. Maybe I should get some type of flow gauge so that I can measure the rate of flow. Does such a gauge exist? hummmmm......
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Old 04-04-2012, 01:13 AM   #12
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ok...here's my results and what I did:

I took a sample after chilled to 50 degF and I then ran the wort into the fermenter.
After all the wort was in the fermenter, I capped it and shook it for 30 seconds, then burped the cap, and repeated for 6 times. Wort temp was 50 degF.
After doing this, I removed the same volume that I tested earlier and then measured the ppm. I recorded a reading of 4.6ppm of O2. Not too good for all that shaking.
Bottom line? I'm going back to injecting pure O2 for 45 seconds and save myself some work. All that shaking for practically nothing.
Hope this helps!
Going from 1.5 to 4.6 is a pretty nice increase considering you increase oxygen by 300% without any investment other than an upper body without. Yes it pales in comparison vs pure O2 but your yeasties will appreciate a 300% increase.

Also thanks for posting data. Actual measurements are always welcome.
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Old 04-04-2012, 01:20 AM   #13
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Going from 1.5 to 4.6 is a pretty nice increase considering you increase oxygen by 300% without any investment other than an upper body without. Yes it pales in comparison vs pure O2 but your yeasties will appreciate a 300% increase.

Also thanks for posting data. Actual measurements are always welcome.
I have since corrected the op. The sample that was tested before the shaking today came in at 2.3 ppm. Sorry for omitting that piece of info.
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Old 04-04-2012, 02:20 AM   #14
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This is a really cool thread to follow. What is the orifice size of the stone your using?

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Old 04-04-2012, 03:25 AM   #15
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What are you using to measure and where did you get it? I thought the equipment to check it was like $1000¿

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Old 04-04-2012, 04:03 AM   #16
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Maybe I should get some type of flow gauge so that I can measure the rate of flow. Does such a gauge exist?
I have a medical oxygen regulator, something like this:

http://www.ebay.com/itm/H-M-Medical-...ht_1290wt_1152

I set it to 0.5 Lpm. Works great
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Old 04-04-2012, 04:22 AM   #17
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Originally Posted by wottaguy View Post
Great question!
I would say that I get an even bubbly flow, not so that the surface is churning,
and I do move my wand in a circular motion while oxygenating. I would call it a medium flow. Maybe I should get some type of flow gauge so that I can measure the rate of flow. Does such a gauge exist? hummmmm......
Think you could post up a video next time you aerate some wort? I have an 02 setup, but often wondered how much to goose it. The last couple batches I've done i just set it at a mediumish rate and swirl the wand like you, for about a minute. Sounds like I'm close.
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Old 04-04-2012, 12:11 PM   #18
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Originally Posted by sdugre View Post
I have a medical oxygen regulator, something like this:

http://www.ebay.com/itm/H-M-Medical-...ht_1290wt_1152

I set it to 0.5 Lpm. Works great
Say...nice find! Will this fit on one of those red cylinders typically found at home depot or lowes? Thanks for this link! Just what I needed!
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Old 04-04-2012, 12:22 PM   #19
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This is a really cool thread to follow. What is the orifice size of the stone your using?
I'm using a 2 micron stone affixed to an acrylic racking cane. The next time I oxygenate a wort, I'll provide some pics.
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Old 04-04-2012, 01:04 PM   #20
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What are you using to measure and where did you get it? I thought the equipment to check it was like $1000¿
I'm using a Milwaukee Portable DO Meter Model: MW600
I picked it up on eBay some time ago and just got around to using it. I happened to get a great deal on mine and couldn't pass it up. (lower price that the one currently listed)

http://www.ebay.com/itm/Milwaukee-MW...item3eff2d6386

It works great!
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