HygroSet Super Accurate Digital Hygrometer

Most people don't know, but every hygrometer should be calibrated, how else do you know if it is accurate? Up until now, after you calibrated your hygrometer you had to remember how "off" the reading was from actual humidity. In 2005 I came up with a simple idea. Create a digital hygrometer that can not only be calibrated, but can easily be adjusted after calibration. Simply perform the 75% salt test using our One-Step Calibration Kit or the salt in a bag test, adjust to the correct humidity, press the set button, and your HygroSet is calibrated and ready to go!

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

  • Extremely accurate
  • Temperate Range: 0 to 50 C/ 32-120F
  • Humidity Range: 20% to 99% RH (relative humidity)
  • Humidity accuracy +/- 2% at 65% to 75%
  • Attaches with Velcro for easy removal
  • Temperature accuracy +/- 1 degree
  • Includes long-lasting battery
  • Measures in Celsius and Fahrenheit

Customer Reviews

Based on 40 reviews
Steven Jacobs
Hygrometer showing low RH Reading

I purchased this hygrometer and a Boveda calibration kit. I calibrated the hygrometer and it was reading 42% RH. I used the knob to adjust the reading to 75% however it won’t go that high so I still have to do mental math. I spoke with support and was told to remove the battery, turn the knob to the left and reinsert the battery, recalibrate and try again. I got the same results after trying this fix. The hygrometer still functions, my problem is I bought this type so I wouldn’t have to do the mental math -trying to remember this hygrometer is off 13% and my analog is off 10%. Not sure if maybe there’s just a defect with mine or if this is common.

John KD Smith

Does not work. After following the instructions to the letter T.
Still does not set right.

Cos Barron
Took out the guess work

I’ve got an older humidor that was my brother in laws. It had a analog hygrometer and it was off by at least 10%. This fit the bill , now I know the correct humidity and temp.

Ron Levan
Good but not great

I like this hygrometer, however, the instructions for calibration are horrible. According to the instructions there was supposed to be a plastic bag to put it in, there wasn't. Also, the adjustment to get the final calibration did not work. Still not sure if it's entirely accurate but it matches my other hygrometer so I'm guessing it is.

so far, good

The hygrometer was well packed and arrived safely. The included battery had a little tab that prevented current drainage prior to use. I haven't calibrated yet but like the fact that that's available.