Gravity reading seems off - Home Brew Forums
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Old 05-09-2012, 04:12 AM   #1
DougQ
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Apr 2012
Military, U.S.A.F/ Rota, Spain
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I just took a hydrometer reading right before i transferred to my secondary and it seems off. The first one was at 1.040 and now its at 1.008 it has been fermenting since 29 April and today is May 8th, my temp is 68 degrees and the kit is an Irish red ale. Is there something wrong?



 
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Old 05-09-2012, 05:21 AM   #2
KuntzBrewing
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Aug 2011
Kokomo, Indiana
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The first reading was your starting gravity (SG) its your wort full of sugar. The disolved sugar causes the wort to be more dense, and the specific gravity is the measurement of this, as the yeast eat the sugar and piss alcohol and fart co2 the disolved sugar dwindles, that's why your gravity changed.



 
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Old 05-09-2012, 05:32 AM   #3
djfriesen
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Sep 2011
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Not to be overly picky, but SG is typically specific gravity, while OG and FG are original and final gravity, respectively.

On Topic:
Those numbers seem plausible. What did the kit say they should be? If there is significant disparity, ensure you are accounting for the temperature difference between your temps and what your hydrometer is calibrated for. I don't see anything that has me thinking red flag right now.

 
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Old 05-09-2012, 05:33 AM   #4
Dunerunner
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Good attenuation!!

 
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Old 05-09-2012, 05:39 AM   #5
KuntzBrewing
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Quote:
Originally Posted by djfriesen
Not to be overly picky, but SG is typically specific gravity, while OG and FG are original and final gravity, respectively.
Too picky lmao

 
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Old 05-09-2012, 11:52 AM   #6
RM-MN
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Nov 2010
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Quote:
Originally Posted by KuntzBrewing View Post
Too picky lmao
Not too picky, just clarifying so the proper terms are used. Using the wrong terms can lead to misinformation as the terms mean something different to the posters. You wouldn't want your pharmacist to mistake mg for ml in your prescription even though in many cases either would be OK as they would be the same for some medicine. It's just that when they aren't the same and you take 2 ml instead of 2 mg and the density is sufficiently different that you overdose.

 
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Old 05-09-2012, 06:23 PM   #7
DougQ
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Apr 2012
Military, U.S.A.F/ Rota, Spain
Posts: 23

OK so this was very first batch, it is an Irish red ale from northern brewer. The first reading i took when the Wert was transferred to my carboy after my boil, it was 1.044. Then after my airlock stopped bubbling for three days i transferred to my secondary carboy and took another reading and it was 1.008. sorry for any confusion, and back to my question should my reading be this low?

 
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Old 05-09-2012, 06:36 PM   #8
cfonnes
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Jun 2010
Utah
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Use one of the many online gravity to alcohol converters. Like this one.

http://pint.com.au/calculators/alcohol/

OG = 1.044
FG = 1.008

Alcohol by volume = 4.65%

You can check the calibration of your hydrometer by putting it in water that is at the temperature printed on the hydrometer. It should read 1.000

 
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Old 05-09-2012, 07:29 PM   #9
afr0byte
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Aug 2010
Vermont
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Quote:
Originally Posted by cfonnes View Post
Use one of the many online gravity to alcohol converters. Like this one.

http://pint.com.au/calculators/alcohol/

OG = 1.044
FG = 1.008

Alcohol by volume = 4.65%

You can check the calibration of your hydrometer by putting it in water that is at the temperature printed on the hydrometer. It should read 1.000
*Distilled water

 
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Old 05-09-2012, 07:32 PM   #10
FredTheNuke
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Feb 2012
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or if you use the same hydrometer for BOTH readings it won't matter if it is a few points off because you are simply measuring the delta and multiplying by 1.3...



 
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