Boveda 75% RH One-Step Calibration Kit
The Boveda One-Step Calibration Kit is the simple, surefire method to accurately calibrate any digital or analog hygometer. Using the 75.5% RH standard, the One-Step Calibration Kit is also used by some of the top museums to calibrate their instruments, including the National Gallery of Art.
Boveda 75% RH One-Step Calibration Kit

The Boveda One-Step Calibration Kit is the simple, surefire method to accurately calibrate any digital or analog hygometer. Using the 75.5% RH standard, the One-Step Calibration Kit is also used by some of the top museums to calibrate their instruments, including the National Gallery of Art.




by Rick Rusch in CO on August 04, 2020
Used this calibrate my new digital hydrometer and it was spot on.
by M Williams in New Jersey on August 26, 2019
Does what is suppose to do.
by Jason in SC on July 31, 2011
One of these came with a new (2nd) humidor I purchased and it worked great and easy to calibrate both my old and new hygrometers separately or together.
by mike in Des moines on January 21, 2011
It's a small price to pay for jnsurance.I have about ten electronic hygrometers that I have to constantly recalibrate.(Rarely for analog.)Without this item I wouldn't know how far off they are.
by Tim in Live Oak, FL on June 16, 2011
I have 3 hydrometers and each read differently. This item sure confirmed the actual humidity.