Product Overview
Simply place your hygrometer inside the bag, close the zipper, and wait 24 hours. A perfectly-calibrated hygrometer will read 75% Rh. If your hygrometer reads above or below 75%, adjust the calibration by the number of percentage points it is off from 75%.
Lasts approximately one year, good for multiple calibrations.
Easy to use
Produces an environment of 75-percent humidity
