1. Welcome to PlowSite. Notice a fresh look and new features? It’s now easier to share photos and videos, find popular topics fast, and enjoy expanded user profiles. If you have any questions, click HELP at the top or bottom of any page, or send an email to help@plowsite.com. We welcome your feedback.

    Dismiss Notice

Sodium Chloride & Calcium Chloride Hydrometers

Discussion in 'Ice Management' started by Kubota 8540, Feb 17, 2015.

  1. Kubota 8540

    Kubota 8540 PlowSite.com Addict
    Messages: 1,952

    There seems to be a lot of confusion as to which Hydrometer to use and as to the readings they should produce. I will attempt to clarify the use of each hydrometer. I am going to use 1 website to do this. There is no particular reason I am using this website (Novatech International), other than its clarity and descriptions. If you use the model number of each hydrometer and do an internet search you may be able to find a better price.

    I use a "percentage by weight" hydrometer. The reason why? Less subdivisions or increment markings on the hydrometer. I have no use for the 0-80% & 95-100% markings on a hydrometer that reads 0-100%. So I use a hydrometer that reads 0-26%, that measures "by weight" rather than "by saturation". Either hydrometer will get you the info you need. One is no better than the other. You can also use a "specific gravity hydrometer", generally one that will take a reading of specific gravity from 1.000-1.600 specific gravity.

    SO..........................................
     
  2. Kubota 8540

    Kubota 8540 PlowSite.com Addict
    Messages: 1,952

    "specific gravity hydrometers"

    Measuring "Specific Gravity"

    http://www.novatech-usa.com/Products/Specific-Gravity-Hydrometers/6603-6

    If you do an internet search for the specific gravity of Salt Brine you will find that it is 1.179 s.g. http://www.varitech-industries.com/pdfs/Salt Brine Statistics and Rock Salt.pdf

    Likewise if you do a search you will find the specific gravity of calcium chloride. http://www.liquidcalciumchloride.com/Literature/ProductInfo/LIQUIDOWProdInfo.pdf Calcium Chloride Hydrometers... http://www.novatech-usa.com/Products/Sodium-Chloride-Calcium-Chloride-Hydrometers/6611-3

    All are calibrated for an accurate reading @ 60F, meaning the temperature of the liquid you are measuring will need to be at 60F for an accurate reading or you will have to use a correction chart to adjust for temperature difference on this Hydrometer.

    You can use this method to test your liquid whether it is salt brine or calcium chloride.
     
    Last edited: Feb 17, 2015
  3. Kubota 8540

    Kubota 8540 PlowSite.com Addict
    Messages: 1,952

  4. Kubota 8540

    Kubota 8540 PlowSite.com Addict
    Messages: 1,952

    "% by weight Hydrometers"

    % by weight hydrometer measures the weight of salt dissolved into the water and gives you a % reading. This percent reading should be 23.3% on this hydrometer.

    http://www.novatech-usa.com/Products/Sodium-Chloride-Calcium-Chloride-Hydrometers/6611-2

    The reading should be taken when the temperature of the liquid salt brine is at 60F, if it is not a correction chart will need to be used.

    Hydrometer correction chart.jpg

    A bit confusing, but, if your liquid temp is 50F subtract 1 from the reading you see on your hydrometer. If your liquid temp is 40F then subtract 2 from the reading on your hydrometer.

    If you are making brine and the temp of your liquid is 70F you will need to add 1 to the reading on your hydrometer. If your liquid temp is 80F then you will need to add 2 to the reading on your hydrometer.

    This hydrometer is calibrated to be accurate when the liquid temp is 60F.

    Hydrometer correction chart.jpg
     
  5. Kubota 8540

    Kubota 8540 PlowSite.com Addict
    Messages: 1,952

  6. Kubota 8540

    Kubota 8540 PlowSite.com Addict
    Messages: 1,952

    Did I miss anything? I feel brain drained.
     
  7. iPlowNH

    iPlowNH Member
    Messages: 87

    Thanks a whole bunch. I got a brine maker and a brine setup for one of my trucks. Cranked out the first batch of brine tonight using the 2.3 lbs of salt per gallon and came up with a funky reading. Used bagged solar salt because the bulk salt I had on hand was dirty. Only hit 78 on the meter. Didn't know what to do next. You were very accurate in all your descriptions and links. Thanks again.
     
  8. Kubota 8540

    Kubota 8540 PlowSite.com Addict
    Messages: 1,952

    If you are using a "0 to 100% Sodium Chloride (NaCl), % Saturation Hydrometer", you need to add more salt. Make sure the water temp is at/close to 60F. If not use the correction table.
     
    Last edited: Dec 26, 2015
  9. iPlowNH

    iPlowNH Member
    Messages: 87

    Thanks a lot! Headed back out in the morning to get it right.
     
  10. Masssnowfighter

    Masssnowfighter Senior Member
    from ma
    Messages: 203

    Thanks kubota for all the info!!! I still have one question. What is the correct number for saturation percentage? Is it 88.3 %? I have the Misco refractometer and I always just use the freeze point scale on it . I usually run the brine maker till I get a reading of -2 degrees
     
  11. Kubota 8540

    Kubota 8540 PlowSite.com Addict
    Messages: 1,952

    Yes, 88.3% Saturation.

    http://www.alkar.com/download/pdf/So...0for 60F.pdf