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-   -   hydrometer (http://www.homebrewtalk.com/f32/hydrometer-123415/)

alexcider 06-11-2009 02:38 PM

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 ?:confused:


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

Pronay 06-11-2009 02:39 PM

Get a dual Wine/Beer Hydrometer

gregbathurst 06-11-2009 09:29 PM

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

JLem 06-12-2009 04:40 AM

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

archroy 06-12-2009 05:12 AM

I recommend a plastic hydrometer if you can find one, the glass ones break too easily

gratus fermentatio 06-12-2009 12:15 PM

Get a hydrometer jar with your hydrometer, just in case it doesn't come with one.

alexcider 06-12-2009 11:12 PM

Quote:

Originally Posted by gratus fermentatio (Post 1377038)
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

JLem 06-12-2009 11:16 PM

Quote:

Originally Posted by alexcider (Post 1378339)
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.

http://www.homebrewunderground.com/i...-reading-3.jpg

alexcider 06-12-2009 11:22 PM

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

JLem 06-12-2009 11:59 PM

Quote:

Originally Posted by alexcider (Post 1378347)
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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