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Home : Tools : Measuring tools : Digital Humidity Gauge

Digital Humidity Gauge

Read 18 Reviews   |   Write a Review

It's easy to monitor your shop — or your guitar case — with this extremely affordable, accurate and space-saving digital hygrometer.

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Digital Humidity Gauge
Item# Description In stock Price Quantity
5795 Digital Humidity Gauge Yes
3 or more $26.45  

Quantity prices apply to multiples of the same item number Selected currency  


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Affordable humidity/temperature monitor.
Experienced luthiers try to maintain 40-50 percent relative humidity in their shops, the range at which wooden stringed instruments are most stable. Excess dryness causes wood to shrink and crack. Too much moisture can cause wood to swell, and newly-sprayed finishes to blush.

The easy-to-read display provides relative humidity and Fahrenheit/Celsius temperature at a glance. A memory function stores minimum and maximum daily readouts. Unlike analog gauges, the unit has no imprecise moving parts and never needs calibration. It operates between 20-99 percent relative humidity, with reliable accuracy to 1 percent.

A handy magnetic mount and battery are included.
Dimensions: 3-1/2" x 1-1/4" x 1/4" (90mm x 32mm x 6mm). Super-slim to fit in your guitar case, too!
5-year manufacturer's warranty.

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 Ratings and reviews
Digital Humidity Gauge
Digital Humidity Gauge
4.5 out of 5 stars
Based on 18 ratings Write a Review
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Displaying 1 – 10 1  2 >
5 1-03-2014
Works great!

Very compact, very responsive, perfect fit for my Martin case. Stew Mac delivered super fast, another great transaction!!!

banjaboy  Vancouver BC Canada Read my reviews (5)
4 11-22-2013
It's good

It's a good gauge. I verified it with others gauges and it's enough precise

Fredpistacchio  Sparks, NV Read my reviews (2)
4 10-09-2013
Caliber IV Hygrometer: Amended Review

Several months ago I gave the Caliber IV a poor review for not correctly reading 100% humidity (rain). I have been monitoring readouts on both units in more moderate conditions. This evening they registered 34% RH, the same as the weather station nearby. Conclusion: Accuracies appear to be linear, mid-range.

Sam Richards  Temora Australia Read my reviews (2)
5 8-28-2013
Great product

After I got mine, can´t live without it!!

AndrĂ© Rossi  Curitiba - PR - Brasil Read my reviews (3)
1 8-13-2013
Cigar Box Toy

This is the "Caliber III" manufactured in China for Western Humidor Corporation. It is calibrated poorly for accuracy when relative humidity (RH) is 75%, which is ideal for a humidor. I simply don't understand why StewMac and others pawn these off on trusting customers.

Nekobasu  South Lake Tahoe, CA, USA Read my reviews (2)
StewMac responds

Thank you for your order. We're sorry you were unhappy with the Digital Humidity Gauge. We offer a 100% guarantee; if any item fails to meet your expectations, you may return it, unaltered, for a refund or exchange.

5 4-27-2013
This is work)

Compact and work. All that you need. 5 stars

Andrew Vaganov  Russia, Ul'yanovsk Read my reviews (3)
1 2-27-2013
Caliber IV Readouts Inaccurate

I recently purchased two Caliber IV units for the workshop and timber store. I used a nearby Bureau of Meteorology weather station as a RH reference. Units were placed on a table with door open. It's raining and the weather station readout is 100%. I would expect the Caliber IV units to read ~99%, their maximum. Both Caliber IV units read 75%. Maximum calibration adjustment is +/- 6%. This was confirmed by manufacturer's email. Both units will be returned to Stewmac.

Sam Richards  Temora Australia Read my reviews (2)
4 2-02-2013
this works!

I took my new humidity gauge to the workshop of an experienced and trusted luthier friend who keeps his shop humidity constant and checks it constantly with two expensive gauges. To my surprise and pleasure my new gauge quickly recalculated and matched his gauges. This thing works!

Griffin ukulele  Bellingham wa Read my reviews (4)
5 1-15-2013
Hygrometer and RH levels

It is minus 20 degrees F. in Denver this morning and the furnace contributes to an already very low relative humidity in my shop! It is imperative that I have an accurate way of measuring the RH in the shop so I can build at a constant level. Don't take a chance when for a few bucks you can know with confidence what the RH level is in your shop and avoid almost certain disaster. Robbie O'Brien

O'Brien Guitars  Parker, Colorado Read my reviews (2)
5 11-23-2012
Works perfect!

Works perfect!

looq  Swiebodzin, Poland
Displaying 1 – 10 1  2 > /\ Top of Reviews

Shown on page 76 of our latest catalog.
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