Well I moved my EXO-TERRA thermometer and hygrometer and the thermometer fell apart, I have a feeling they are not worth even the 17 bucks I paid for the set. if I had a properly calibrated set, i could use that to set these ones accurately. I'm betting my guess is as good as the ones i have, lmao. now back to my original question, whats a reliable brand of digital hygrometer/thermometer with prob?