Ahhhh!!! 2 different hygrometers...2 different reading!

Discussion in 'Incubating & Hatching Eggs' started by HappyBC, Feb 16, 2013.

  1. HappyBC

    HappyBC Out Of The Brooder

    Right at day 17 too! Better get a third one before lock up and hope for the best!
    This humidity thing is tricky....
  2. fried green eggs

    fried green eggs Chillin' With My Peeps

    Mar 25, 2011
    S.E. Michigan
  3. Egghead_Jr

    Egghead_Jr Overrun With Chickens

    Oct 16, 2010
    NEK, VT
    It's super easy to do a salt test to calibrate your hygrometer. If your hygrometers are adjustable then adjust them to read accurately after the test or simply put a piece of tape to tell you to add or subtract whatever the amount it reads off from calibration.

    Items needed:
    small bottle cap
    zip lock type bag 1 or 2
    table salt

    Put salt in bottle cap, add drops of water until damp not sloppy or making a slurry just damp paste consistency. Put cap and hygrometer in zip lock bag (allow air in bag for bubble) and if want to put that bag in another zip lock sandwich bag.

    Wait 4 hours with this on your table. It should read 75% humidity if not then that is how much your hygrometer is reading off true RH. If your hygrometer is adjustable wait to adjust until it settles back down to room humidity. It drops so fast you'll never do a proper adjustment until the gauge stabilizes back to room RH.
  4. HappyBC

    HappyBC Out Of The Brooder

    Thanks very much! I will give this a try

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