Quote Originally Posted by DSpythons View Post
http://www.amazon.com/gp/aw/d/B0007V...pi=SL500_SS115

Would this work? I know the pet store ones are junk. I saw some one post a metal one before that is supposed to be very accurate.

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Looks good.

I suggest you look up the "salt test" this is how you will calibrate your hygrometer.