HygroSet® Adjustable Hygrometer (Round) w/Bóveda Calibration Kit


Adjustable Digital Hygrometer. (1 ⅞” Dia. x ½” Th) w/Bóveda Calibration Kit.

Never wonder if your digital hygrometer is accurate! The HygroSet® is the first digital hygrometer of its kind capable of being adjuasted after calibration. Each click of the adjustment knob changes the humidity display (+ / -) by 1%.


  • Easy-set calibration instructions
  • Humidity accuracy +/- 2% from 20% to 90%
  • Temperature accuracy +/- 1 degree (displayed in Celsius or Fahrenheit)
  • 10 second refresh rate
  • Button cell battery included

Note: This hygrometer is not compatible with exterior mount humidor models.

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″

Shipping Information

Weight 2 oz
Dimensions 2 × 2 × .6 in


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