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Boveda for Cigars | One-Step Calibration Kit | Preloaded with 75% RH 2-Way Humidity Control | Precise Salt Test for Digital and Analog Hygrometers and Humidity Sensors | 1-Count
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- INACCURATE HYGROMETER READINGS PUT PREMIUM CIGARS AT RISK. Precisely calibrate digital and analog hygrometer and humidity sensors, so they give accurate relative humidity (RH) readings of what’s going on inside a humidor
- PATENTED SALTWATER-BASED BOVEDA is the ultimate salt test! Do-it-yourself calibration methods, like bottle cap salt tests are imprecise and inaccurate. Trust only Boveda, the global leader in 2-way humidity control
- EASY, MESS-FREE CALIBRATION—Simply place a hygrometer or humidity sensor in the airtight high-density bag with the enclosed Boveda humidity pack. Zip closed and check back in a day
- GET PRECISE RH READING IN JUST 24 HOURS—If a hygrometer doesn’t read 75% RH, adjust by the number of points it’s off, then re-test. For added accuracy, do a 2-point calibration with a 32% RH Boveda One-Step Calibration Kit (sold separately)
- REUSABLE FOR MULTIPLE HYGROMETERS/SENSORS—Good for 3 months after opening (2 years if unopened in original packaging). Re-calibrate a hygrometer or humidity sensor every 6 months to keep it performing effectively
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Even if your hygrometer says it doesn’t need to be calibrated, it does—every 6 months. Find out if your hygrometer is giving accurate readings with the Boveda One-Step Calibration Kit, an easy-to-use, professional-level salt test. An uncalibrated hygrometer is like using no hygrometer. You’ll never get an accurate relative humidity (RH) reading from a hygrometer or humidity sensor until it’s precisely calibrated. A well-calibrated hygrometer gauges if your premium cigars are stored at proper RH. Chemists and lab professionals determine the accuracy of a hygrometer with a “salt” test. Unlike the bottle cap salt test, the Boveda One-Step Calibration Kit is precise, mess-free and ready-to-use. Just slip a hygrometer in the airtight, high-density bag preloaded with Boveda. The patented saltwater-based pack uses natural salts and pure water to achieve 75% RH inside the bag. After 24 hours, check the hygrometer’s reading. If it doesn’t read 75% RH, your hygrometer is off. Simply adjust it, zip it back in the bag with the Boveda and verify the reading the next day. For added accuracy, perform a 2-point calibration with the 32% RH Boveda One-Step Calibration Kit (sold separately) to check the high and low RH readings of your hygrometer. Note: Do not mix different Boveda RH levels within the same humidor. And do not use Boveda in the same humidor with other humidification products because they will fight against each other and reduce the efficiency of Boveda.
Simply place your hygrometer inside the bag and completely re-close the zipper. Allow the Calibration Kit to sit for a minimum of 24 hours at room temperature, 65 to 75°F. The hygrometer should read the RH% level stated on the Calibration Kit. If not, note the difference for the future readings or adjust your hygrometer if applicable.
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So I bought an AcuRite hygrometer and wanted to calibrate it just to see how accurate it was (I'm just using the hygrometer for my home this winter). I don't know if I was lucky, or if the AcuRite hygrometer or this calibration kit were super accurate, but as you can see in the picture, mine read exactly 75% humidity. Nice.
CALIBRATION NOTE: Calibration may take some time! I think any negative reviews for their hygrometer or this kit come from people who may not know how slowly moisture content changes, especially with calibration. The calibration kit says to keep it in the calibration bag for a minimum of 24 hours. I highly recommend keeping it inside for longer.
Straight out the box, I hung my unit for a day and it read somewhere between 60 and 65% humidity in the house. I put it inside this calibration bag and it took 3 days to get to 71%. I almost took it out and calibrated it up 4 percentage points (to 75%), but I kept it inside. Next day it read 72.8% and since it was increasing, I thought to wait and see how high it would get so I left it. I ended up forgetting about it and four days later it was at 74.9%. That’s when I took pictures with it still in the bag. Upon moving the bag for the pictures, the reading fluctuated to 75, 75.1, then back to 75. But I mean, you can’t get much more accurate than that.
THE POINT IS THAT IT TOOK LIKE A WEEK TO CALIBRATE EXACLTY TO 75%, so that’s why I recommend leaving your hygrometer to calibrate for definitely longer than a day, and wait before writing a bad review for a “bad” hygrometer or "bad" calibration kit. Moisture is a fickle thing! Unlike temperature.
By the way, this is ONE bag. Picture shows "2" bags only to show the front and back.
We bought both the 32% and the 75% kits in order to test our meters at both ends of the range. It turned out that a couple of the meters were fine at one end but inaccurate at the other ... worth knowing in my opinion.
Our meters are about 3-1/2 by 4 inches and just fit with the Boveda pouch. Double-check before you buy.
We placed the meter with the display facing out, so that we could see the progress of the calibration test (sort of a no-brainer, but maybe it's worth mentioning).
We resisted the urge to stop before the 2 or 3 days that Boveda recommends, and sure enough the readings continued to adjust during the final stretch.
Make sure the ziploc is fully sealed, otherwise it's of no use doing the test.
The use-by window seems to be only a few months, so I doubt we'll have a 2nd go-round with these packets, but we've already gotten our value out of them.
The calibrating packet comes in a flat Ziplock bag that's about 4-3/4" x 5". Your hygrometer needs to fit inside this bag.
I suppose you could use a slightly larger Ziplock bag or a small glass jar or a Tupperware container, but don't go too large. The packet can control only so much air volume.
The device works and helped me calibrate about 6 different hygrometers. I now know how many percentage points they are off from true 75%.
Just a heads up, the bag provided for this kit is fairly small and won't fit larger hygrometers. Boveda recommended using a glass container with an air tight seal for calibrating the larger one.
Have since used on others.
If you are looking for a simple solution and have 8 bucks to spare, this is it. Highly recommend.
Top international reviews
Works as advertised time and time again.