Hope I'm not breaking any forum rules, but here is a cheap hygrometer combined in with a weather station. Got this tip from a member on another forum. I believe in helping everyone get smarter. I plan on ordering one, he says salt tested good at 75%, maybe he got lucky, don't know if you can calibrate, just account for the difference once properly salt tested, if not. He said his has been working well for a few months with original batteries. Makes you wonder how they can sell them that low.
http://www.ebay.com/itm/380383641079...84.m1423.l2649
$5 free shipping
