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Boveda - "One-Step" Hygrometer Calibration Kit
Simply place your hygrometer inside the "One-Step" Calibration 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%. The Boveda two-way humidity control technology - as used in the One-Step Hygrometer Calibration Kit - is based on scientific principles (Raoult's Law and Henry's Law) that have been known for well over 100 years. One of those principles is that a saturated solution of salt in water will maintain a constant level of relative humidity inside an enclosed chamber. This principle is widely used and accepted by chemists and lab professionals to determine the accuracy of any hygrometer, whether digital or analog.
Size: 4.5" x 9"
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