110L Oxygen tank & 0.5 lpm regulator:

[vonHolt]

Just a heads up - Oxygen used for welding is not the same (clean/sterile) as medical oxygen. Welding Oxygen won't have the same level of filtering as medical. Not sure of the exact differences and how that relates to using welding oxygen with beer.

Used to be a welder (a long long time ago) and remember this fact cause it was almost beaten into us, especially when caught taking a couple of blasts on a Monday morning after a weekend on the rip.

[Hop Bomb]

My number 12 post was about right then if you allow 80-90% transmission rate

Whats the flow rate on your regulator when open full blast?  If you know that then yeah you could roughly gauge your lpm by opening the reg half way or whatever.

@ VonHolt:  Its fine. Most homebrewers are using welders oxygen. Shiny here did a petri dish test of open air when bottling etc & you'd be surprised whats floating around the air we breath. Welders oxygen is defo more pure & a cleaner way to aerate. Medical oxygen is expensive (the medical oxyfit bottle is 85 GBP compared with the welders oxyturbo which is 20e)

[Hop Bomb]

Idea:  We could buy one of those cheap flow meters from ebay china & an extra tank of the oxyturbo. Then we could calibrate each oxyturbo regulator to an agreed LPM. Mark it with a sharpie or something. Cheaper than buying a fixed flow reg or everyone buying the ebay flow meter.

[Will_D]

How to measure flow rate without a flow meter:

Fill 1 litre plastic bottle with water.

Fill kitchen sink with cold water.

Put thumb over bottle, invert and place in sink. You now have a bottle full of water upside down in the sink!

Stick the oxygen tube into neck of bottle and time how long it takes to fill bottle.

Simples

[Ciderhead]

Mr Will is so clever  

[Shane Phelan]

My number 12 post was about right then if you allow 80-90% transmission rate

Whats the flow rate on your regulator when open full blast?  If you know that then yeah you could roughly gauge your lpm by opening the reg half way or whatever.

@ VonHolt:  Its fine. Most homebrewers are using welders oxygen. Shiny here did a petri dish test of open air when bottling etc & you'd be surprised whats floating around the air we breath. Welders oxygen is defo more pure & a cleaner way to aerate. Medical oxygen is expensive (the medical oxyfit bottle is 85 GBP compared with the welders oxyturbo which is 20e)

I will do the same test again with the oxygen by letting it flow for a minute directly onto a petri dish. Should give us a fair idea of what's in it. 

[Hop Bomb]

Wholesale Welding Supplies rang & gave me their best price:

Regulators @ 23e all in
Oxygen @ 19.50e all in
Delivery for 1 box (no matter how many bottles/regs) @ 5.95e

[Shane Phelan]

Tom that is a great price!

[Dr Jacoby]

Brilliant. Well I'm definitely up for this. I'd also like to get a flow meter. This is the cheapest I have been able to find so far.

[Shane Phelan]

Where did everyone get their aeration stone? I'm thinking the stainless steel ones are superior to the ceramic ones?

Edit: Its payday this week for me and I'm sure I'm not the only one. 

[Hop Bomb]

Think Il buy one of those flow meters too. Good find!

These are 137 bar so going off WillD the bottles should have 137 litres in them?

I got my .5  SS stone here:  http://www.homebrewstuff.com/diffusion-stone-5-micron.html

Hop & Grape do a 2 micron SS stone here:   http://hopandgrape.co.uk/public/detailv1.asp?itemcode=STA20069953

[Dr Jacoby]

I bought this bad boy not too long ago and had a friend bring it back to Ireland (they don't ship internationally). I don't think anywhere else does a similar all-in-one stainless set-up, but there are versions where the air stone is connected to tubing. Morebeer do one I think?

I've read that it can be tricky to keep the airstone submerged with soft tubing during oxygenation but I suppose you could use stiffer tubing. In fact, I think I might be robbing that idea from someone I talked to at the Alltech convention over the weekend. Ciderhead maybe?

[Dr Jacoby]

Wholesale Welding Supplies rang & gave me their best price:

Regulators @ 23e all in
Oxygen @ 19.50e all in
Delivery for 1 box (no matter how many bottles/regs) @ 5.95e

Is this a group buy price? Myself and Shiny are brewing a monster beer this weekend and it would be great to have the ability to oxygenate it properly. If those prices are for NHC buyers (but not for a group buy) then I might go ahead and get mine straight away. Otherwise I'll hold on for everybody else.

[Hop Bomb]

Ive got my stone & tubing inside a stainless spear I removed from a keg. Stiffer tubing would work also. You could weigh it down with a stainless nut/bolt? The wand is a much more elegant solution though.

[Dr Jacoby]

Ive got my stone & tubing inside a stainless spear I removed from a keg.

Very clever! Nice solution