Hydrometer/Humidity Question

JScatt69

In the Brooder
9 Years
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Hello All!
I am using a wet bulb type hydrometer. I understand that the humidity should be kept at 50% for the first 18 days or so, is that correct? 50% humidity would be about a 84 degree reading on the hydrometer? The humidity doesn't seem to stay consistant, seems it goes to the low side, could that be because of conditions outside the bator? Unfortunatly I can't keep it in the house. Last night the water bottle went dry and there was no water in the bator in the morning. Do you suppose any damage was done? Eggs are on 3rd day. Last question.... Any recomendations on a digital thermometer/hydrometer combo that has a probe type sensor? I have an old Marsh Roll-X and the plastic top has gotten cloudy over the years which makes it hard to see the thermo. Thanks!!
 
Personally I think 50% is a little high... I prefer 35% to 45% until lockdown and then around 65% for hatch... That is how I got my best results... I have even had a good hatch when I did not add any water until lockdown and then bumped the humidity up to 75%... The best way to know is to candle eggs at 10 days along to see how the airsac is progressing... and then adjusting the humidity if needed. I use a AcuRite 00891 Digital Thermometer and hygrometer. Did you calibrate your hygrometer to see if it is off?
 

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