How To Read Hydrometer

Discussion in 'Tutorials, Calculators, Wine Logs & Yeast Charts' started by djrockinsteve, Nov 6, 2010.

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  1. Nov 6, 2010 #1

    djrockinsteve

    djrockinsteve

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    How To Read A Hydrometer.

    By taking a specific gravity reading before the introduction of your yeast to the must, then again when fermentation is complete can you determine the alcohol percentage by volume. Subtract the final reading from the beginning to get your answer.

    When your hydrometer stops declining for 3 days in a row can you be certain that fermentation has ceased.

    Hydrometers can contain any or all of the following scales, specific gravity, % of alcohol by vol., pounds/ounces of sugar per gallon and temperature.

    [​IMG]
     
    Last edited: Jan 15, 2011
  2. Apr 22, 2015 #2

    socialdougal

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    I just got my first set of hydrometers. There are three, they are made of glass, measure alcohol percentage, and have scales of 0-40, 40-70, and 70-100, respectively.

    I've done a little home brewing from kits in the distant past, and recently decided on a whim I'd get back into it. No kits, but I have three batches of country wine and one of beer in progress. The fermentation of two appeared complete and have been racked.

    Never used a hydrometer before. Can someone please advise on a minimal-mess, sanitary, efficient methodology?
     
  3. Oct 20, 2015 #3

    sour_grapes

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    Here is a good video to give a visual:

    [ame="https://www.youtube.com/watch?v=ty7PAJaBsts"]https://www.youtube.com/watch?v=ty7PAJaBsts[/ame]
     
  4. Mar 13, 2018 #4

    johnjmorton

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    Joe Cousin likes this.
  5. Mar 14, 2018 #5

    sour_grapes

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    Reposting due to conversion problems with new forum:

     
  6. Mar 19, 2018 #6

    Scooter68

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  7. Jan 24, 2019 #7

    Tnawal

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    211C597B-2588-4CD2-98BC-DA18119D7FD8.jpeg Am I reading this correctly? 1.014
     
  8. Jan 24, 2019 #8

    salcoco

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    yes buy a digital refractometer only one drop required. adjustment spread sheets available to correct for alcohol distortion,easy peasy just read the digits.
     
  9. Jan 24, 2019 #9

    cmason1957

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    That looks like it might be one of the plastic hydrometers. A word, not sure why, but the one I bought has now been thrown away. After about 5 or 6 batches, it started giving a very different reading than any of my glass ones, I forget now if it was reading high or low, but it was consistent, at least.
     
  10. Jan 24, 2019 #10

    Tnawal

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    Thanks, first time I am making my own wine. I did a second rack today and the kit said it should be between 1.015 - 1.025 to bottle it. I am not sure if that will be accurate because I added half the f pack at the beginning to bump up the alcohol.

    I know I definitely need a longer siphon hose for the next time.
     
  11. Jan 27, 2020 #11

    travelnutt

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    So if my initial reading on the must is 1.060 and the final reading after fermentation is below 1, what is my percentage of alcohol?
     
  12. Jan 27, 2020 #12

    Johnd

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    8B8B5FC9-62B8-430B-ABB6-0110A4194CC1.png
     
  13. Jan 28, 2020 #13

    travelnutt

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    Can I increase the % of alcohol by slowly adding sugar during the fermentation process?
     
  14. Jan 28, 2020 #14

    Johnd

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    Yes, you just need to determine what you want the final ABV to be, and add the appropriate amount of sugar. It’s best to start off with the SG required to reach your ABV, but if your fermentation is already going, it can be done.
     
  15. Jan 28, 2020 #15

    travelnutt

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    Thank you. I appreviate the advice
     

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