Hi Gang,
So I made my own incubator and am now dialing in the humidity levels on it.
My incubator is in my basement... which is a steady 58 degrees with around mid-40's RH% (Relative Humidity). I say "around" because I can't be certain. I have 3 different hygrometers and they are giving me whacky results.
So a few days ago I put the white Springfield one and the larger Acurite one into a ziploc bag with a coffee cup of 1/2 cup salt and 1/4 cup water for 12 hours. This is the common method used to create a known 75% RH level inside the ziploc sealed bag so you can see how accurate your hydrometers are.
> Springfield read 69% (so 6% low)
> Acurite read 70% (so 5 % low)
After I took them out, they equalized to room RH% but adding back their error margin gave me two different %'s... so I worried I did something wrong in the calibration test.
So I bought the PetCo hygrometer... which folks said was pretty accurate.
Last night I put them all into a new ziploc sealed bag for another round of calibration
> Springfield read 69% (so still 6% low)
> Acurite read 70% (so still 5% low)
> PetCo read 77% (so 2% high)
So the first two were at least consistent... and the PetCo one did seem pretty good right out of the box.
So I take all three into the basement near my incubator and let them equalize to the basement temp/RH for over an hour. That is the picture you see above.
If we factor in their margin of error determined from the calibration test, the readings they give would be:
Springfield: 46% + 6% = 52%
Acurite: 43% + 5% = 48%
PetCo: 43% - 2% = 41%
It does not appear that the margin of error scales evenly from the higher % range to the lower % range. If I just take them at face value and ignore the margin of error present from the calibration test... they look like they are all pretty much in the same ballpark. But when I account for the margin of error... they don't seem to match up. This bugs me! haha
Thoughts? Thanks!
**edited because I meant "hygrometer" not "hydrometer"... haha
So I made my own incubator and am now dialing in the humidity levels on it.
My incubator is in my basement... which is a steady 58 degrees with around mid-40's RH% (Relative Humidity). I say "around" because I can't be certain. I have 3 different hygrometers and they are giving me whacky results.
So a few days ago I put the white Springfield one and the larger Acurite one into a ziploc bag with a coffee cup of 1/2 cup salt and 1/4 cup water for 12 hours. This is the common method used to create a known 75% RH level inside the ziploc sealed bag so you can see how accurate your hydrometers are.
> Springfield read 69% (so 6% low)
> Acurite read 70% (so 5 % low)
After I took them out, they equalized to room RH% but adding back their error margin gave me two different %'s... so I worried I did something wrong in the calibration test.
So I bought the PetCo hygrometer... which folks said was pretty accurate.
Last night I put them all into a new ziploc sealed bag for another round of calibration
> Springfield read 69% (so still 6% low)
> Acurite read 70% (so still 5% low)
> PetCo read 77% (so 2% high)
So the first two were at least consistent... and the PetCo one did seem pretty good right out of the box.
So I take all three into the basement near my incubator and let them equalize to the basement temp/RH for over an hour. That is the picture you see above.
If we factor in their margin of error determined from the calibration test, the readings they give would be:
Springfield: 46% + 6% = 52%
Acurite: 43% + 5% = 48%
PetCo: 43% - 2% = 41%
It does not appear that the margin of error scales evenly from the higher % range to the lower % range. If I just take them at face value and ignore the margin of error present from the calibration test... they look like they are all pretty much in the same ballpark. But when I account for the margin of error... they don't seem to match up. This bugs me! haha
Thoughts? Thanks!
**edited because I meant "hygrometer" not "hydrometer"... haha
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