Boveda EZ Calibrating Kit

Description: This is a simple and surefire method to accurately calibrate any digital or analog hygrometer. The kit uses a 75.5% relative humidity standardâwidely used and accepted by chemists and lab professionals to determine the accuracy of any hygrometer (also known as the salt test). Humidipaks One Step Calibration kit is used by some of the top museums in the world to calibrate their instruments, including the National Gallery of Art in Washington D.C. Easy to Use. Automatically Created 75.5% Environment. Lab Tested for Accuracy. Reusable. Lifetime Warranty.