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2 Year Asurion Lawn & Garden Extended Protection Plan

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1 Year Asurion Lawn & Garden Extended Protection Plan

from Asurion, LLC
  • Mechanical and electrical failures are covered after manufacturer warranty expires
  • If we can't fix it, we will issue you an Amazon Gift Card for full replacement value
  • Protection when you need it from a name you can trust
  • No deductibles or additional fees. Easy claims online or by phone. Contract is emailed to you within hours of your purchase.
  • Fully Transferable. 100% refund within first 30 days

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Caliber IV Digital Hygromter by Western Humidor

4.4 out of 5 stars 549 customer reviews
| 61 answered questions

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  • Advanced humidity sensor maintains accuracy to +/- 1%
  • Pre-calibrated out of the box + User recalibrate-able
  • Three day high/low & averages for humidity & temperature
  • Secure magnetic mount
  • Battery included
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Frequently Bought Together

  • Caliber IV Digital Hygromter by Western Humidor
  • +
  • Boveda One-Step Hygrometer Calibration Kit - 75% RH - Standard Small
  • +
  • Boveda 72% RH 2 Way Humidity Control, Large, 60g, 4 Pack
Total price: $48.64
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This item Caliber IV Digital Hygromter by Western Humidor
Customer Rating 4 out of 5 stars (549) 3 out of 5 stars (63) 4 out of 5 stars (999) 4 out of 5 stars (383)
Price $23.79 $10.99 $17.77 $7.97
Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping
Sold By Cigar Essentials Inkbird Amazon.com Boveda Inc.
Color Black Black Black White
Item Dimensions 0.39 x 3.94 x 1.18 in 1.4 x 3.9 x 0.6 in 2 x 2 x 0.5 in 9 x 4.5 x 0.25 in
Material Type Plastic Metal, Plastic Plastic Plastic
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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. Comes pre-calibrated out of the box. Dimensions: Length: 4” Width: 1.3” Depth: 0.4” Battery Included


Product Information

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Customer Reviews

Top Customer Reviews

By James M. Koury on March 1, 2015
You have to love the other reviewers that measure their glowing satisfaction of the hygrometer by how closely it reads to other digital hygrometers they have. This tells you absolutely nothing of its accuracy.

- I recently purchased three of the $32 Extech 445703 Big Digit Hygro-Thermometer units as well as a $19 La Crosse Technology 302-604R-TBP from Amazon and checked them against the Caliber IV

- I then put all five in a zip lock bag along with a slurry salt mixture which is the only sure way to calibrate a hygrometer and check for accuracy.

- A salt slurry calibration humidifies the air in a zip lock bag to exactly 75%. All 3 Exectechs and LaCross 302 all had identical reading, but 10% too low at 65%! This is why you cant check for accuracy just by comparing them to other units. But the Western Caliber IV tested correctly to 75-76% right from factory. And this is one of the few that can be calibrated if it should read too high or low, none of the others can.

- The Western also reached a stable reading in about 30 min but it took the others about 6-7 hours to reach a stable reading.

They are all going back and I'm buying another Caliber IV.

Do the salt calibration and see for yourself. Dont check on accuracy by comparing to other hygrometers!
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Over the years, I've spent hundreds of dollars on multiple types of hygrometers. None were even remotely accurate, always inconsistent, just garbage. Only exceptions are the hygrometers that are too big to fit inside your average medium to small humidors. Along comes Caliber IV. I have multiple humidors so I thought I would buy 2 at a time and test both. See my enclosed pic of a Boveda calibration kit with 2 Caliber IV hygrometers inside being tested. Hard to get more accurate and consistent than this.
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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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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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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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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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I purchased two of these: one about 18 months ago and one last week. The earlier one worked fine for the humidor use. It was ~ +_ 2% of the scientific hygrometers I use in the laboratory. The latter one though was off by 10% compared to my other calibrated hygrometers at home. To this add the very dim display, and the instruction by the manufacturer that you cannot use the salt calibration procedure, etc. Even the thermometer was off by 4°F. Just isn't worth it. Perhaps they have switched to a new manufacturer with lax quality control. Whatever the case, I wouldn't recommend it.
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