hydrometer off by 10%!

Discussion in 'Incubating & Hatching Eggs' started by perfectly_polish, May 23, 2008.

  1. perfectly_polish

    perfectly_polish Crowing

    Mar 1, 2007
    I have eggs going in the hatcher tomorrow and I was setting it up and I have 2 hydrometers and one will be reading 41% and the other will be reading 51%. I though maybe it was because they were in different spots, but I even put them right next to eachother. So which one do I trust? One is a flukers and the other one is this kind.. http://www.cutlersupply.com/store/item.0458.html
  2. Crunchie

    Crunchie Brook Valley Farm

    Mar 1, 2007
    I quit trusting my hygrometers alltogether after one too many "sticky" hatches, where my chicks would pip, try to zip, and get shrink-wrapped in the membrane even though they would say my humidity was 60-70% [​IMG] Day 18 I fill all the trays, put a few wet paper towels (I usually hatch in egg cartons; I'll put wadded up paper towels in any extra holes) in there (I know a lot of people use sponges, too) and make sure not to open the 'bator again!! I use a straw and syringe (high-tech, huh? [​IMG]) to add hot water through the vent holes after day 18. If I have moisture condensating on the window, I know I'm good. No droplets of water on the window, I add more hot water to the 'bator. I also periodically make sure my paper towels are damp. So far this has worked better than going off of the hygrometers!

    For me, and I know it can be different for different people in different climates, etc., it works best to err on the side of not enough humidity the first 17-18 days and too much the last 3.
  3. heritagebirds

    heritagebirds Songster

    Apr 15, 2008
    Eastern Shore MD
    I have read of a method of calibrating a hygrometer... it involves moistening salt in a small cap and sealing it with the hygrometer in a ziploc baggie. It is supposed to produce humidity of 75.5%... If your hygrometer is adjustable, you can set it for the correct %age. I got one that is adjustable from www pipestuff.com. They sell cigars stuff, hence the name.
  4. Davaroo

    Davaroo Poultry Crank

    Feb 4, 2007
    Leesville, SC
    I too prefer the cigar humidor hygrometers.

    You could average the two and call it good. You dont need laboratory grade precision with humidity - it cant hurt, but isnt needed.
  5. chickenshadow

    chickenshadow Songster

    Mar 28, 2008
    My Flukers vary a lot. If I put all three of mine in a bator none are the same.

    Be wary of Flukers. Try and find a wetbulb if you can.
  6. equus2

    equus2 Songster

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