Boveda One-Step Hygrometer Calibration Kit

Even if your hygrometer says it doesn’t need to be calibrated, it does—every 6 months.

Find out if your hygrometer is giving accurate readings with the Boveda One-Step Calibration Kit, an easy-to-use, professional-level salt test. For just a few dollars more, check readings at either end of the RH spectrum with the 2-point calibration kit, which includes both the 75% RH and the 32% RH tests. Double your peace of mind—ensure your hygrometer is giving you accurate high AND low readings.