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19
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3answers
3k views

How Does a Hydrometer Work?

I know how to use my hydrometer, and I know what numbers to look at and write down on my brewing sheets, but I'm not sure what those numbers actually represent, or even what units I should use to ...
3
votes
1answer
186 views

Reading a 3 scale hydrometer

My dad bought me a hydrometer and then left the country. Now I don't know how to read all measurements. 1st scale: 1-13% (I presume this is the potential alc scale) 2nd scale: 1-26 3rd scale: 1-28 ...
1
vote
2answers
319 views

Use aquarium hydrometer for brewing

I am currently looking for a better way to monitor brewing progress than to have to pop out my syphon every few days and syphon it out for a hydrometer reading. Now I am currently looking at using a ...
3
votes
4answers
187 views

How did people know whether their brews were done before the hydrometer was invented?

All advice I've seen given here and on other brew sites relies heavily on the use of a hydrometer, which I assume is a somewhat recent invention. However, people have been brewing and drinking for ...
6
votes
6answers
371 views

First batch tragedies?

Brewed my very first batch today. It is a stout and is sitting in my basement as I type. I would call the day a success--a whole lot more work than I thought. Hopefully only two things went wrong: ...
1
vote
1answer
2k views

How to tell if a cider is finished without hydrometer

EDITED I have a cider that I have made following the steps on CraigTube for his Hard Apple Cider. The only difference is that I have used Champagne yeast and the batch is 22L. I know you are all ...
1
vote
1answer
431 views

Hydrometer exploded

I'm really worry, I made a wort some hours ago, and right now I see that my hydrometer is broken in the bottom, the last time I used it was in the hot wort previous to boiling, and it seems like some ...
2
votes
2answers
487 views

What unit does my hydrometer show?

My hydrometer shows units I can't conciliate with whatever I read on the internet. It shows from top to down: 00 10 20 30 40 50 On Internet however,the gravity should be measured in floats of ...
5
votes
1answer
151 views

How might trub effect taking original gravity?

For the beer that I brewed this past weekend, I finally remembered to take an Original Gravity reading. Unlike my previous last three attempts, I actually had a little more than my target 1 gallon, ...
1
vote
2answers
437 views

Expected Hydrometer Reading for White House Honey Ale?

A bit of background: This is my second beer batch. My first beer batch turned out well as an Irish Stout, using the Midwest Brewing kit and recipie I just started a White House Honey Ale I'm ...
2
votes
2answers
201 views

should I/how do I account for temperature differences for gravity readings?

I've taken my OG at the start, and another reading last night. Only last night did I register that my OG seemed slightly low according to what the brew can suggested as typical. My OG was 1.037 (can ...
7
votes
3answers
202 views

Why shouldn't we just use scales?

New on homebrew.SE, great forum here. Just a quick question - why shouldn't we just use weight scales to determine the OG and FG? My Hydrometer has broken and I can't be stuffed really buying a new ...
4
votes
1answer
279 views

Hydrometer correction equation

Can you identify the constants in your hydrometer correction equation? I know that 2.6X10-6 is the coefficient of thermal expansion for the hydrometer glass; what are the others (not related to ...
3
votes
1answer
224 views

Does trub effect your gravity reading?

took a gravity reading today at the end of the transfer from the kettle and there was quite a bit of trub in the cylinder, like the whole flip'n tube. so would the trub hold the hydrometer up and give ...
2
votes
3answers
746 views

Hydrometer reading interference

When brewing an IPA about a week ago, my starting gravity reading came out to be 1.12 - significantly higher than the listed target of 1.07 on the recipe. I had suspicions of error at the time which I ...
3
votes
2answers
158 views

Hydrometer Calibration and its effect on OG

I tested my hydrometer in distilled water at 68F and it reads 0.994. If I have an original gravity reading of 1.050 do I simply add .006 to this reading or is there a more advanced formula to ...
3
votes
2answers
639 views

Potential causes of unreliable pre-boil gravity measurement

I usually take a hydrometer reading immediately after sparge so that I can calculate total points of gravity (i.e. gravity reading * volume), and from there calculate what volume of wort I should ...
3
votes
1answer
3k views

My first homebrew has a very low alcohol content

I just finished my first homebrew (yay!), but my hydrometer is reading a very low alcohol content. I brewed an Edme bitter (pre-made wort and I bought the malt extract) and it tastes great, but it's ...
3
votes
3answers
723 views

Any reason not to lower a hydrometer into my secondary?

Is there any reason not to simply lower a hydrometer into my carboy during secondary fermentation, so that I can monitor gravity just by peeking in with a flashlight? I'm thinking about doing this ...
7
votes
7answers
781 views

Cure for foamy hydrometer?

Whenever I take a SG reading with my hydrometer I have a hard time getting an accurate reading because of a few mm of foam at the surface. Does anyone have any suggestions on how to get rid of the ...
6
votes
2answers
247 views

Why measure gravities?

I've brewed a good dozen batches of beer from kits, extract, extract+grain, and now all-grain, and I've never measured gravities. Why measure gravity, besides to know what you're getting? Is there any ...
6
votes
1answer
184 views

Can the final gravity be multiplied by the ratio of beer to water?

If one ends-up with, say, half as much beer as needed to float the hydrometer, is dilution a viable way to get a measurement? For instance, if one carefully measured the volume of available beer ...
5
votes
2answers
351 views

Hydrometer reading

I am getting ready to dry hop and transfer a Double IPA to a secondary Better Bottle. If I want to take a hydrometer reading at this time is it better to use a thief or just put the hydrometer in the ...
6
votes
3answers
490 views

Hydrometer Temperature Limit

I am about to do my first all-grain batch. After (batch) sparging is it safe to drop the hydrometer right in or do I need to let the wort cool to a specific temperature first? I realize I will have to ...
1
vote
1answer
296 views

Can I retroactively deterimine my OG with a refractometer?

Brewed a big Belgian beer last week. And using my refractometer (poorly, as it turns out), I wasn't able to get a solid reading of the OG. Now a week later I've taken a sample of the beer and want to ...
17
votes
5answers
3k views

Alternatives to a hydrometer?

I can't seem to keep a hydrometer for more than a few brewing sessions. They either break from dropping them, going from hot to cold, or I've had the wax holding all of the lead pellets to the bottom ...
7
votes
1answer
454 views

Calculating the exact alcohol volume

Using a hydrometer is great for most people, but the geek in me would like to know the exact alcohol content of my brew. What would be the process, titration? And what chemicals would I need?
8
votes
2answers
237 views

Sterilisation processes when taking hydrometer readings

When taking hydrometer readings, is it acceptable to return liquid to the fermenting vessel after taking a reading in a vial? Must the vial/measuring cylinder and hydrometer have been sterilised to ...
2
votes
2answers
434 views

Fermentation Issues???

Fermentation Help I have need some thoughts on what I should do with this batch of beer. I am brewing a clone kit which is called Belgium Wit. The directions were a little off based on the equipment ...