How do I calibrate my hygrometer?

In this step by step video, we show you exactly how to calibrate your hygrometer. This is one of the most important parts of caring and preserving. How would you know if your product is at the appropriate RH level if your hygrometer isn’t working correctly?

Using the Boveda One-Step Calibration Kit:

  1. Simply place your hygrometer inside the bag and completely re-close the zipper.
  2. Allow the Calibration Kit to sit for a minimum of 24 hours at room temperature, 65 to 75°F
  3. The hygrometer should read the RH% level stated on the Calibration Kit. If Not, note the difference for the future readings or adjust* your hygrometer if applicable.

For calibrating a Boveda Butler refer to the User’s Guide included in the packaging. (Additional download available, CLICK HERE.)

*Note: If you choose to adjust your hygrometer you must place it back into the Calibration Kit for a minimum of 24 hours to see if the adjustment was accurate.

Boveda’s two-way humidity control technology—as used in the One-Step 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 immutable law is the foundation of Boveda. This principle is widely used and accepted by chemists and lab professionals to determine the accuracy of any hygrometer, whether digital or analog. This is why Boveda should be used to establish the correct level of humidity inside your container, package or humidor, or to check the accuracy of your hygrometer.