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Old 06-11-2009, 02:38 PM   #1
alexcider
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Default hydrometer

hey


i want to buy a hydro meter but im not sure what one to buy there are loads on ebay but i dnot knoe which one is right for the job aswell when can i use it do i have to wait like a mounth then test the cider ?


which one should i use ?????????????????

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Old 06-11-2009, 02:39 PM   #2
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Get a dual Wine/Beer Hydrometer

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Old 06-11-2009, 09:29 PM   #3
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Don't get a cheap one. Proper wine hydrometers come with a certificate to show they have been tested. I recently bought a professional wine hydrometer which is calibrated in beaume, a measure which shows potential alcohol ie 10 degrees beaume = 10% abv if fermented to zero.It cost $38 aussie.
If you don't plan on getting into winemaking in a major way a cheap one is fine because it is the relative readings which matter. the change in the readings shows the progress in the fermentation. You measure before and during fermentation which shows how fast the wine is fermenting, some recipes require you to rack before primary is finished which is around 0 beaume or 1.000 SG.
Most on this forum use Specific Gravity (SG) instead of beaume, a reading of 10 beaume = app 1.074. it doesn't matter too much which you use, its the change that matters.

http://www.labsafety.com/refinfo/ezfacts/ezf117.htm

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Old 06-12-2009, 04:40 AM   #4
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A simple, relatively cheap triple scale hydrometer will suit you just fine for beer and cider (not sure about wine).

Something like the first on here - NORTHERN BREWER: Hydrometers and Refractometers

EDIT: here's some on ebay - triple scale hydrometer items on eBay.com

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Old 06-12-2009, 05:12 AM   #5
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I recommend a plastic hydrometer if you can find one, the glass ones break too easily

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Old 06-12-2009, 12:15 PM   #6
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Get a hydrometer jar with your hydrometer, just in case it doesn't come with one.

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Old 06-12-2009, 11:12 PM   #7
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Quote:
Originally Posted by gratus fermentatio View Post
Get a hydrometer jar with your hydrometer, just in case it doesn't come with one.
do you need a jar and can some one explain to me like roughly how to use them plz
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Old 06-12-2009, 11:16 PM   #8
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Quote:
Originally Posted by alexcider View Post
do you need a jar and can some one explain to me like roughly how to use them plz
Yes, you need a jar - or at least some tall, narrow container that you can put your beer into and float the hydrometer. I use the case that mine came in.

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Old 06-12-2009, 11:22 PM   #9
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right so i would fill the jar hing up with my cider then float the hydrometer in it then but on all the ones i have seen have like 900 or like 990 on side how do u work this out for a % for your achoal

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Old 06-12-2009, 11:59 PM   #10
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Quote:
Originally Posted by alexcider View Post
right so i would fill the jar hing up with my cider then float the hydrometer in it then but on all the ones i have seen have like 900 or like 990 on side how do u work this out for a % for your achoal
First, you need to make sure you read from the specific gravity scale - the 900 or 990 you are refering to is really 0.900 or 0.990.

To calculate your ABV - you need two readings - an original gravity before fermentation (OG) and a final gravity when fermentation is COMPLETELY done (FG). ABV = (OG - FG)x129

So, if your OG is 1.050 and your FG is 0.990, your ABV = (1.050 - 0.990) x 129 = 7.74%
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