acu-rite hygrometer at wallyworld

They are hit and miss but for the most part if you need a few this is a good buy in bulk. I have bought 6 I think maybe 7. I only had one that was off by more than 5 and it was way off, 10ish I think. I took it back and exchanged it for one that was off by 2. Almost every one I have is low not high and mostly by just 2 or 3. I have salt test them all at reg intervals and they don't appear to be getting worse, so I just keep the like units together and know they are off by what ever they are. I have 2 in one vino that tested low by 2. They read 68 every day I look at them (Scott's beads in the vino by the way).

Chas