Well that makes sense... I was honestly thinking it would measure the outside temp at the prob instead of the box, which you keep indoors.. I put the box inside just to check and it is at 56% and climbing.. Sad thing is we also have a Repti- somthing Analog one from Petsmart.. It's reading 75%, who knows how good that one is, others told me it was junk and that's why we went with the Acu-rite... Haha, at least I know it's close to being the right humidity for her.. I kept worrying she would try to shed and it only be 40% I know it's still low for a shed, but better than 43-46% that I thought it was in her tank!
Thanks for the answers Kitedemon too.. I'll look into an Analog one.. I guess we'll wait and see how well the Repti one matches to the acu-rite one while they're both in the tank.