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SG readings 
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Joined: Tue Jul 20, 2010 3:01 pm
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Post SG readings
Wondering if you experienced home brewers can give me some advice.

When it comes time to do the SG reading to see if the batch is ready to bottle, do you put the hydrometer into the fermenter for the reading, or do you decant some out into another vessel and put the hydrometer into that.

Going to see if I can get things going in my new kit on the week end.


Thu Jan 05, 2012 1:49 pm
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Enthusiastic Gardner

Joined: Fri Aug 19, 2011 6:31 pm
Posts: 362
Location: Wallendbeen NSW 2588
Post Re: SG readings
I've always measured In the fermenter. Just make sure that you are scrupulous about sterilizing your equipment s you don't want to contaminate your brew.

An alternative is to save your pennies and buy a brewers 's Refractometer. That requires only a strong light source and 1 drop of brew. It works by indicating the degree of refraction of light, which is constant although there is a conversion factor for temperature. I have one that measures SG of salt water from when I used to keep marine aquariums. No good for alcohol though unless you puld work out a conversion factor. They aren't too expensive:

http://www.homebru.com.au/index.php?mai ... cts_id=960

Although a lab grade one can be around $15,000+++

Cheers,
Alan

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Thu Jan 05, 2012 4:36 pm
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Joined: Sat May 15, 2010 1:37 pm
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Post Re: SG readings
I decant some into another container Gizzy.
saves risking contaminating the wort.

Its actually a tube only slightly larger than the Hydrometer.

Though I have to admit to not check SG any more - I broke my Hydrometer :o

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Thu Jan 05, 2012 7:36 pm
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Green Thumb

Joined: Tue Jul 20, 2010 3:01 pm
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Post Re: SG readings
ahh cool. I got a tube thingy that the hydrometer goes in. Might use that.

Thanks all.

$15K is a bit rich for me Alan ;)


Thu Jan 05, 2012 9:37 pm
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Joined: Fri May 14, 2010 12:40 am
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Post Re: SG readings
I decant, but if it's sterile it doesn't make a difference if you do it in the brew or in a measuring cylinder. Only problem doing it in a brew is if the brew has a big krausen (froth you get while brewing) it can be hard to read.

Refractometers are good, but they're much more expensive and do the same thing, so I'd still lean towards a hydrometer. The only thing I strongly recommend them for is checking the sugar content of apples prior to pressing for cider.


Thu Jan 05, 2012 9:44 pm
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Post Re: SG readings
Quote:
ahh cool. I got a tube thingy that the hydrometer goes in. Might use that.


Thats the way :thumbright

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Fri Jan 06, 2012 5:27 am
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