Calibrating Hygrometer

Giants85 · 03-08-2010, 04:59 PM

I'm not having much luck with these cheap walmart hygro's either...I took my old hygro (not sure the brand name, purchased a few years ago) and 2 of these walmart $6 jobs and stuck them in a bag to test.

After about 20 hours in the bag the old hygro reads 71% (previous test I did about 2 years ago had the hygro -5%, so this number was right what I expected). But the other 2 walmart hygro's read 63 and 55, they seem to take a lot longer to get an accurate reading.

My old hygro was always about 10-20% higher than the walmart ones, I think I'll leave them in another day to see if I can get close to the 75% mark but if I can't I think I might return them and invest in a better hygro.

03-08-2010, 04:59 PM	#10
Giants85 Still Watching My Back Join Date: Feb 2010 First Name: Justin Location: Monroe, NY Posts: 91 Trading: (4)	Re: Calibrating Hygrometer I'm not having much luck with these cheap walmart hygro's either...I took my old hygro (not sure the brand name, purchased a few years ago) and 2 of these walmart $6 jobs and stuck them in a bag to test. After about 20 hours in the bag the old hygro reads 71% (previous test I did about 2 years ago had the hygro -5%, so this number was right what I expected). But the other 2 walmart hygro's read 63 and 55, they seem to take a lot longer to get an accurate reading. My old hygro was always about 10-20% higher than the walmart ones, I think I'll leave them in another day to see if I can get close to the 75% mark but if I can't I think I might return them and invest in a better hygro.