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 41 reviews
"Ready to use out of the box" - Not

I've ordered several things from CheapHumidors over the past couple of months, and this is the first item I've not been satisfied with.

That said, there's a reason the product photo shows 63%, because that's where this thing sits after calibration (it should be around 75%). The adjustment knob doesn't really 'click', but even turning it all the way to the right still leaves it short of 75% I should have read all the bad. Also, not paying shipping-and-handling AND a restocking fee to send it back becase that's basically equal to the original cost, so I'd be out double my $. Thermometer seems to work...guess I'll let my kid use it in his fort.

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 Smitty

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.