Humidipak's One-Step Calibration Kit is a simple and surefire method to accurately calibrate any digital or analog hygrometer. The One-Step Calibration kit utilizes
Humidipak's 75.5% relative humidity standard - widely used and accepted by chemists and lab professionals to determine the accuracy of any hygrometer (also known as the "salt test"). Humidipak's One-Step Calibration kit is used by some of the top museums in the world to calibrate their instruments, including the renowned National Gallery of Art in Washington D.C.
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