$15.99 $23.99 You Save 33% ($8.00)
works great and they can be calibrated. you will be hard pressed to find any that can be calibrated for that price of these
Set it and forget it. Accurate within 1% as advertised. Have bought one each humidor and guitar case. Will buy again
This is a good hygrometer at the price, but make sure you follow the calibration instructions that come with it or else your readings will be off.
I used the salt test first, but I think the tupperware that I put it in was too big (since I originally got a reading of only 68 rh). Then I put it in the boveda calibrating kit and got a solid 75. Little expensive but you get what you pay for and that is an accurate hygrometer.