Hygrometer Test Results.

Discussion in 'Incubating & Hatching Eggs' started by Nathan, Jan 19, 2009.

  1. Nathan

    Nathan Chillin' With My Peeps

    Dec 10, 2008
    Camas, WA, USA
    I did the hygrometer check on my two of my hygrometers by using salt and water and a plastic bag.


    Given enough time:
    My digital radio shack thermometer hygrometer reads 63.
    My reptile cage analog hygrometer reads 50.

    Comparing this to 75%, both are reading low. Which is good because they never seemed to get high enough.

    The reptile one is the one that will fit inside the incubator if it has enough stick left. Adjusting for the error I will probably strive for 30-35% for the first 18 days and 50% for the last three.
  2. william9792

    william9792 Chillin' With My Peeps

    Nov 23, 2008
    graham, nc
    thats good that you know that they are off now, mine reads -7 when i did mine. i do my humidty at 35-40% days 1-18, then up to 50-55% last three. so that should work good for you
  3. jvls1942

    jvls1942 Chicken Obsessed

    Oct 16, 2008
    Quote:Mine tested at 75%..

    BUT I have a question..

    let us say for example,, yours was
    -7.. now when you take a reading,
    and it reads 40% it really is 47% ?

    just how accurate is that?? isn't there some co-efficient adjustment needed? just wondering since we are talking about % and not degrees..
  4. Nathan

    Nathan Chillin' With My Peeps

    Dec 10, 2008
    Camas, WA, USA
    Yes, I have wondered about that myself - is the error subtractive or a ratio.

    If my hygrometer reads 50 when the humidity is 75 should it read 20 when it is 30 or should it read 5?

    If the error was a smaller number, I guess it wouldn't matter as much.
  5. miss_jayne

    miss_jayne Lady_Jayne

    Jun 26, 2008
    Columbiaville, MI
    i am doing this test today on two hygrometers.

    one reads 70% and the other reads 46%. i have about 4 hours to go.

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