Quote Originally Posted by martin82531 View Post
I would recommend this:

http://amzn.com/B00BDN2ILC
http://amzn.com/B000A3UBLA

When I got mine, the temp was accurate when comparing with a IR gun I have, and the hydrometer was exactly 75% RH. I would not use the adhesive tape inside the enclosure, I would use a hot glue gun or magnets.
Okay thank you! So that pack is just for calibrating the hygrometer?