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Caliber IV Digital Hygromter by Western Humidor

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List Price: $29.99
Price: $25.00 & FREE Shipping on orders over $35. Details
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  • Advanced humidity sensor maintains accuracy to +/- 1%
  • User recalibrate-able
  • Three day high/low & averages for humidity & temperature
  • Secure magnetic mount
  • Battery included
3 new from $24.99

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Frequently Bought Together

Caliber IV Digital Hygromter by Western Humidor + Boveda One-Step Hygrometer Calibration Kit - 75% RH - Standard Small + DryMistat Humidor Humidifer Tubes - Set Your Humidor To 70% Humidity - 2 Pack
Price for all three: $45.23

Buy the selected items together


Product Details

  • Product Dimensions: 3.9 x 0.4 x 1.2 inches
  • Shipping Weight: 1.6 ounces (View shipping rates and policies)
  • ASIN: B00JXOKQVW
  • Average Customer Review: 4.5 out of 5 stars  See all reviews (176 customer reviews)
  • Amazon Best Sellers Rank: #128 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden)
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Product Description

Western Humidor has always been known as the maker of the most accurate hygrometers in the cigar industry and beyond. Western Humidor is original designer of the digital hygrometer for the cigar industry. The famed Caliber III is now the Caliber IV. It has been updated with an easy re-calibration option and new packaging but the same reliable performance. Slim profile design, Humidity & temperature readings & Fahrenheit/Celsius switchable. Dimensions: Length: 4" Width: 1.3" Depth: 0.4"

Customer Reviews

Easy to use, small.
Ryan D
My digital hygrometer in another humidor was no longer reliable so I replaced that one with this new Caliber IV, no more questions about humidity and temperature.
AMAATY
I calibrated it with Boveda One-Step Hygrometer Calibration Kit. works perfectly in my humidor.
Jon F.

Most Helpful Customer Reviews

24 of 25 people found the following review helpful By DeusEx on March 24, 2013
Verified Purchase
This hygro seems to be winner. The display is smaller than the Xikar that I'm relpacing. However it's still readable thru the glass top of my humidor. Unlike it's predecessor (the Caliber III), this unit can be calibrated should you ever feel the need. However, these come factory pre-calibrated which I intend to leave untouched. The unit is small (about 1 inch wide, by about 4 inches long, by about 3/8" inch thick.) It comes with a magnetic mount and a stick on metal plate. It's update speed is slower than the aforementioned Xikar however that doesn't bother me as I have much more confidence in its accuracy. I will update again after I've had it a few more months.
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25 of 29 people found the following review helpful By Don Daze on November 18, 2013
Verified Purchase
It works sort of ok for my purposes, and I guess this particular one is designed for cigar humidors, which means accuracy is only good at the 70%, where it is intended to be. At the 50-55% level, where musical instruments need to be, it is very inaccurate, but the reviews of the ones designed for musical instruments show the exact same problem, and this one had the best reviews of them all at the time I bought it. Maybe the size makes accuracy at the 50% level impossible? I don't know, but I have another one designed for a large room and I often compare them side by side, they only match if the level is 65% or higher, which is too high for all my needs.
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10 of 11 people found the following review helpful By dsk on February 7, 2014
I ordered the Caliber III. Since it was discontinued, Amazon sent the Caliber IV. I use the Caliber IV in my guitar case. I own a hand numbered, limited edition solid Koa classical guitar. I live in WV, where the humidity can get surprisingly low. Right now, we're struggling to keep the humidity up to 35%, even with a whole house humidifier. The Caliber IV is very small; it's 3" x 1" and only about 1/2" thick. It fits easily into the guitar case. It came with a self-adhesive magnet. Instead, I put velcro on the hygrometer to attach it to the interior of the guitar case. Most importantly, I can calibrate the Caliber IV. Using a professional digital sling psychrometer, I was able to calibrate the Caliber IV to within +/- 1.5%. The Caliber IV is very accurate; I compared the reading on the Caliber with the psychrometer, in various areas of the house, over a period of a couple of hours. The caliber not only stayed in calibration, but accurately sensed the changes in humidity. I have 2 guitars; the other case has a Planet Waves hygrometer. When I compared the Planet Waves with the psychrometer, it was accurate to +/- 4%, which is a large margin of error; it cannot be calibrated like the Caliber IV. I'm getting a third guitar and will buy another Caliber IV for the new case.
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13 of 17 people found the following review helpful By Dave VINE VOICE on August 13, 2013
Verified Purchase
I had to find a quantifiable measure of humidity in my mother's apartment at an assisted living facility because the humidity in her rooms was so high as to crinkle paper and make the furniture feel damp. I bought the subject product in the hopes of establishing some quantification of the problem. I first tested it for both temperature and humidity against the readings from our home weather unit inside and outside measurement transmitters. It was equal in temperature readings and -1% in humidity readings. I then took it to her apartment where engineers had installed more sophisticated equipment. The temperature readings were identical and the humidity readings were +/-2%. This was enough information for me to get them to admit they had a serious problem when humidity rose to 85% in what was supposed to be an air conditioned environment. While I am still battling the facility over their long and apathetic action toward fixing the problem, I have to attribute an instrumental contribution of the Caliber IV Hygrometer to what I believe will be an eventual fix or temporary closure of what was considered a quality institution. At this point, the facts are no longer in question.
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6 of 7 people found the following review helpful By S. Mcevilly on May 6, 2014
Verified Purchase
My application is for a guitar case to monitor and maintain the humidity for high end acoustic guitars. This is a great little unit. I have compared to other units and they are all about the same readings....
Accurate, small, won't break the bank.
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11 of 14 people found the following review helpful By John Dowling on July 27, 2013
Verified Purchase
Needed no calibration out of the box. I have checked calibration after three, and again six weeks, still holding true
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5 of 6 people found the following review helpful By JOE G on June 23, 2013
Verified Purchase
I like this item, it is a bit slow to change the temp reading but overall I do think it is a nice unit and it seems to be accurate comparing it to others.
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5 of 6 people found the following review helpful By alvin burgess on May 25, 2013
Verified Purchase
very well priced replacement for the stock hygrometer. comes calibrated. double checked with the salt test and is very accurate
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