6
votes
Accepted
Sugar in water effect on specific gravity?
To add up on Denny's answer, the density of a solution of sugar and water is (quasi)linear in the range we use in homebrewing (e.g. between 1 and 1.2). (see graph below [0] where concentration in wt% ...
- 799
5
votes
when does the alcoholic fermentation end?
CO2 in suspension will cause bubbles to come out of the airlock long after the fermentation is done. It is an indicator, but not a precise one.
Experience will tell you that for a particular yeast/...
- 4,806
5
votes
Accepted
What is the name for this gigantic dropper or pipe that a person use to suck liquid out of a container?
It is called a 'wine thief'. This should be readily available in any homebrew shop. Possibly in several sizes and qualities even.
- 3,655
4
votes
Measuring alcohol content
If you don't want to do refractometry or hydrometry, your next best generic option would be ebulliometry, which is basically measuring the bubble point of the liquid, where the bubble point depends ...
- 608
3
votes
Sensor for measuring alcohol content of wine
There are relatively affordable devices (iSpindel and TILT) that continuously report specific gravity wirelessly. You can use the data to derive the alcohol content with a pretty good degree of ...
- 41
3
votes
Can blood glucose devices measure anything in beers?
Assuming you're talking about something like this, you could stick it in beer, but it probably won't give you any truly useful information.
The sensors use an enzymatic reaction to determine glucose ...
- 6,417
3
votes
Measuring alcohol content
A vinometer can mesure alcohol of a dry wine (all sugar needs to be fermented). You would need to add some dye to see the results if you have a transparent liquid. It can usually measure between 0 ...
- 4,806
3
votes
Accepted
Measuring alcohol content
The most reliable way to determine alcohol in any fermented drink, without the need for several thousand US dollars in equipment and some seriously technical laboratory procedures, is distillation.
...
- 6,417
2
votes
Accepted
First brew: dry hopped mead, probably stuck. How to best proceed?
We make a lot of meads and I think the majority of your process looks pretty good. (Including the staggered nutrient additions). You might want to consider using a blend of nutrients like DAP and ...
- 36.2k
2
votes
Fruit 'wine' - acetic acid and alcohol
Acid content is generally measured by titration - a pH meter or test papers do not measure content only "acidity".
The sourness is IMHO likely to be lactic acid as lactobacillius are generally ...
- 5,631
2
votes
Sugar in water effect on specific gravity?
Sugar has about 45 ppg. That's gravity points per pound per gallon. So, one lb. of sugar in one gal. of water will give you a specific gravity of about 1.045. That is the known scale. 2 lb. in 1 ...
- 33.4k
2
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First brew: dry hopped mead, probably stuck. How to best proceed?
My answer will not be full, but there are some things I can tell:
Splitting half a dollar worth yeast packet in five? Why?! Especially in double-difficult brew, as it is both pretty high gravity (has ...
- 3,718
2
votes
when does the alcoholic fermentation end?
If you don't have an hydrometer, just keep a close eye to the airlock and give it a few days (3-5) after the activity has stopped. Mind that this is not the correct way to do that and there's no ...
2
votes
Accepted
Measuring alcohol when using ginger bug
If you have a beginning gravity and an end gravity, it's pretty easy to figure an approximate ABV for your beverage.
The only way to definitively tell how much alcohol is in a solution is to run it ...
- 3,012
2
votes
Measuring alcohol content
IMHO HPLC is the best method probably followed by spectroscopy. measuring ABV by distillation is "indirect" due to the formation of an azeotropic mixture between alcohol and water. They cannot be ...
- 5,631
2
votes
Accepted
Method to measure specific gravity above refractometer range?
I believe your idea is correct. I would have recommended exactly the same technique.
- 3,417
1
vote
What is the name for this gigantic dropper or pipe that a person use to suck liquid out of a container?
You can also use a standard cooking baster to transfer liquid to your hydrometer vessel, but I'd recommend one that's made of glass and has a removable rubber bulb.
1
vote
Sensor for measuring alcohol content of wine
There are sensors that do this. I am not personally familiar with their accuracy, maintenance or robustness.
I am aware of this type of device from Anton-Paar
https://www.anton-paar.com/us-en/...
- 36.2k
1
vote
when does the alcoholic fermentation end?
If you have no other instrumentation, look at the airlock.
If the brew is fermenting, there is always going to be positive pressure against the liquid in the airlock, even when fermentation is ...
- 191
1
vote
How much sugar should be added in 1 L of Grape must?
Scaling is very simple math and works with all ingredients.
For example if a recipe is for 1 gallon and calls for 4 oz of sugar.
1 Gallon has 3.79 liters, so 1/3.79=.2638 that's your volume %
To ...
- 18.5k
1
vote
Determine honey density and needed volume for target starting gravity
Determine gravity of honey
Combine a known volume V_w of water with a known volume of honey V_h. measure the gravity of the mixture and denote that quantity g_m.
The gravity of the honey g_h is
g_h =...
- 121
1
vote
First brew: dry hopped mead, probably stuck. How to best proceed?
Grats on your first brew!
This has been well answered on process corrections.
The harsh bitter is from the hop tea, if the cascade was 6.6%AA 60min boil you have about 45 IBUs there which is the top ...
- 18.5k
1
vote
First brew: dry hopped mead, probably stuck. How to best proceed?
I am going to repeat a lot of what Molot has already said but will add a few extra points:
start with healthy yeast, if possible make a starter at least 24 hours in advance. Use a whole packet at ...
- 7,018
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