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Date: 28 Nov 2006 14:29:07
From:
Subject: Can you find alcohol strength of beer once bottled ?
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Is there a way to test the strength of a finished beer without having a
strating gravity reading ?
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Date: 29 Nov 2006 03:47:27
From: John 'Shaggy' Kolesar
Subject: Re: Can you find alcohol strength of beer once bottled ?
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On 28 Nov 2006 14:29:07 -0800, <callieandmark@yahoo.co.uk > wrote:
> Is there a way to test the strength of a finished beer without having a
> strating gravity reading ?
Probably not without sending it to a lab for analysis.
John.
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Date: 28 Nov 2006 18:53:02
From:
Subject: Re: Can you find alcohol strength of beer once bottled ?
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Thats what I was thinking, Ed.
it's probably a safe assumption that someone posting "newbie" question
threads, doesn't have access to a refractometer.
Ed Edelenbos wrote:
> "JoeyB" <joseph.burgel@gm.com> wrote in message
> news:1164758430.763993.318400@l39g2000cwd.googlegroups.com...
> > Yes there is. But you need both a hydrometer and a refractometer. By
> > taking measurements with both instruments you can deduce the OG and %
> > alcohol. The key is one measures a refractive index and the other
> > measures density W.R.T water. I don't recall the name of the formula
> > now but Promash can do it.
> >
>
> Or... (I know, I'm a heathen)... you could just calculate what the OG
> *should* have been, take a hydrometer reading of the finished product, and
> calculate.
>
> If you don't know what the og was, I'd assume it wasn't an all grain batch.
> If it was an extract batch, it ought to be pretty easy to calculate the og.
> If some grains were steeped, it is probably such a tiny percentage it could
> be ignored.
>
> I said I was a heathen.
>
> Ed
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Date: 28 Nov 2006 16:00:30
From: JoeyB
Subject: Re: Can you find alcohol strength of beer once bottled ?
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Yes there is. But you need both a hydrometer and a refractometer. By
taking measurements with both instruments you can deduce the OG and %
alcohol. The key is one measures a refractive index and the other
measures density W.R.T water. I don't recall the name of the formula
now but Promash can do it.
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Date: 28 Nov 2006 19:11:36
From: Ed Edelenbos
Subject: Re: Can you find alcohol strength of beer once bottled ?
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"JoeyB" <joseph.burgel@gm.com > wrote in message
news:1164758430.763993.318400@l39g2000cwd.googlegroups.com...
> Yes there is. But you need both a hydrometer and a refractometer. By
> taking measurements with both instruments you can deduce the OG and %
> alcohol. The key is one measures a refractive index and the other
> measures density W.R.T water. I don't recall the name of the formula
> now but Promash can do it.
>
Or... (I know, I'm a heathen)... you could just calculate what the OG
*should* have been, take a hydrometer reading of the finished product, and
calculate.
If you don't know what the og was, I'd assume it wasn't an all grain batch.
If it was an extract batch, it ought to be pretty easy to calculate the og.
If some grains were steeped, it is probably such a tiny percentage it could
be ignored.
I said I was a heathen.
Ed
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Date: 29 Nov 2006 03:50:30
From: John 'Shaggy' Kolesar
Subject: Re: Can you find alcohol strength of beer once bottled ?
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On Tue, 28 Nov 2006 19:11:36 -0500, <eded@spookeasy.net > wrote:
> Or... (I know, I'm a heathen)... you could just calculate what the OG
> *should* have been, take a hydrometer reading of the finished product, and
> calculate.
>
> If you don't know what the og was, I'd assume it wasn't an all grain batch.
> If it was an extract batch, it ought to be pretty easy to calculate the og.
> If some grains were steeped, it is probably such a tiny percentage it could
> be ignored.
>
> I said I was a heathen.
Nah, it's a good idea. It's pretty simple to calculate the OG for an
extract batch if you know the recipe. Usually steeping grains are only
responsible for a couple gravity points, but you can still calculate them
fairly easily if you really want to.
All grain can be trickier if you don't know what the efficiency was.
John.
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Date: 28 Nov 2006 15:57:01
From: Washu
Subject: Re: Can you find alcohol strength of beer once bottled ?
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> Is there a way to test the strength of a finished beer without having a
> strating gravity reading ?
Yes, you take the SG of the finished beer and a refractometer reading.
>From there you can calculate the starting gravity and ABV.
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Date: 28 Nov 2006 14:38:48
From:
Subject: Re: Can you find alcohol strength of beer once bottled ?
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do you know the recipe? You can make an estimate if you know the FG and
the grain bill...assuming a 65%-80% efficiency for a humebrew setup and
a good guess of around 85% efficiency for a microbrewery.
callieandmark@yahoo.co.uk wrote:
> Is there a way to test the strength of a finished beer without having a
> strating gravity reading ?
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Date: 29 Nov 2006 06:04:15
From:
Subject: Re: Can you find alcohol strength of beer once bottled ?
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On 28 Nov 2006 14:38:48 -0800, harvestwind_73@yahoo.com wrote:
>do you know the recipe? You can make an estimate if you know the FG and
>the grain bill...assuming a 65%-80% efficiency for a humebrew setup and
>a good guess of around 85% efficiency for a microbrewery.
>
>
>callieandmark@yahoo.co.uk wrote:
>> Is there a way to test the strength of a finished beer without having a
>> strating gravity reading ?
You can take a measurement of the alcohol by weight by using an
Ebulliometer. http://www.stpats.com/testeq.htm
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