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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% ...
JeanMi's user avatar
  • 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/...
Philippe's user avatar
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5 votes
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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.
chthon's user avatar
  • 3,665
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 ...
Dave's user avatar
  • 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 ...
elGordo's user avatar
  • 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 ...
Franklin P Combs's user avatar
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 ...
Philippe's user avatar
  • 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. ...
Franklin P Combs's user avatar
2 votes
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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 ...
brewchez's user avatar
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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 ...
barking.pete's user avatar
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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 ...
Denny Conn's user avatar
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2 votes

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 ...
Mołot's user avatar
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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 ...
Raphael Toselli's user avatar
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 ...
farmersteve's user avatar
  • 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 ...
barking.pete's user avatar
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2 votes
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Method to measure specific gravity above refractometer range?

I believe your idea is correct. I would have recommended exactly the same technique.
dmtaylor's user avatar
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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.
Albert Steptoe's user avatar
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/...
brewchez's user avatar
  • 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 ...
S.Robins's user avatar
  • 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 ...
Evil Zymurgist's user avatar
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 =...
DanielSank's user avatar
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 ...
Evil Zymurgist's user avatar
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 ...
Mr_road's user avatar
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