Boveda One-Step Hygrometer Calibration Kit - 75% RH

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  • Boveda One-Step Hygrometer Calibration Kit
  • Boveda One-Step Hygrometer Calibration Kit
  • Boveda One-Step Hygrometer Calibration Kit - 75% RH
  • Boveda One-Step Hygrometer Calibration Kit
Price: $6.99


Boveda's One-Step Calibration Kit is a simple and accurate way to calibrate any digital or analog hygrometer.

The One-Step Calibration Kit utilizes Boveda's 75% relative humidity standard, which is widely used and accepted by chemists and lab professionals to determine the accuracy of any hygrometer (also known as the "salt test"). The 75%Rh pack that comes with this kit uses salt used that is more accurate than the 72% or 69% packs. All Boveda packs are +/-1.0% accurate, while the 75%RH is +/-0.03% accurate!

Simply place your hygrometer inside the bag, close the zipper, and wait 24 hours. A perfectly-calibrated hygrometer will read 75%. If your hygrometer reads above or below that number, adjust the calibration by the number of percentage points it is off from 75%. Then place the hygrometer back in the bag to check that the adjustment worked. The reason to use the included Boveda calibration bag and not a traditional ziploc bag is that it is thick enough and has a special glass coating to stop the moisture exchange. This ensures you are accurately testing the relative humidity inside the bag.


  • Easy to use. Completely maintenance free - no activation required.
  • Lasts approximately 1-year after opening, with a 4-year shelf life before opening.
  • Produces an environment of 75-percent humidity
  • Boveda 75%RH packs are +/-0.03% accurate
  • Boveda calibration bag is very thick and has a special glass coating to stop the moisture exchange with outside air


  • Exterior Bag Dimensions: 5.5" x 7"
  • Interior Bag Dimensions: 4" x 4.5"
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Warranty Information

  • Manufacturer's Lifetime Guarantee.
  • You will have peace of mind when you buy from us because we assist you in filing a warranty claim with the manufacturer should you need to.
  • Other retailers do NOT provide this service.
  • We will be with you from the start of the process by providing you with the warranty contact info and a receipt of your purchase to file a claim.
  • We will be in contact with you during the claims process to make sure you receive the service you deserve.
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Additional Information

Product Type:
Hygrometer Calibration Kits
Country of Origin:
United States of America
Material (Body):
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