Thermometers

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BlackAce

BlackAce

Chirping
6 Years
Jun 7, 2013
105
2
71
I have a digital thermometer (Acurite) and a regular (analog?) thermometer both measure humidity. I have both in my incubator and at sometimes have a 10 degree difference between the two. Which is more accurate? Which do you use and why?
 
I have yet to find a thermometer that I trust. I end up putting all the thermometers I own in there and taking an average.
I bought a medical thermometer from the drug store, thinking that at least I know someone is doing quality control on them. The trouble, though, is that (at least when it's laying sideways) the number it reads only goes up and doesn't come down until you shake it. Oops. But I figure it's still good for helping to judge my other thermometers, and as a bonus, I know whether the temp spiked and came back down because the fever thermometer will read higher than the others.


Some of the discrepancy, though, can be from position in the incubator. Corners are sometimes cooler than the center, and the important temperature is at the top edge of the eggs. One of my books says that you shouldn't even set a thermometer across the top of the eggs (like the incubator instructions show!) because the difference in height could make you think your incubator is warmer than it is.
 
I both in there now and was thinking of adding a third to see. Actually I think I'm going to do that when I get home from work. Then I'll make me feel better and see which one is right.
 
I use a spot check from brinsea to do temps . I CALIBRATE anything I use for humidity and see how off it is. Usually it will be off by the same amount, and I can just correct. I have yet to find any single one that is correct on humidity out of the box, but they are easy to calibrate. I also use the brinsea to calibrate my other thermometers, and check it about once a month against my body temperature.
 
Put the hygrometer in a ziploc baggie along with an eggcup full of salt moistened with water to a thick slush and it should read approximately 75% relative humidity.
 

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