Cigar Oasis Caliber IV Slim Digital Hygrometer

Cigar Oasis

The latest version of the acclaimed Caliber series from Western Humidor (now Cigar Oasis) Western Humidor has always been known as the maker of the most accurate hygrometers in the cigar industry and beyond. The Western Humidor Caliber was the original digital hygrometer for the cigar industry.

The famed Caliber IV features a slim profile design, humidity & temperature readings & Fahrenheit/Celsius switchable. It arrives pre-calibrated out of the box. Gauges between 20-90% Relative humidity (RH)

  • Advanced humidity sensor maintains accuracy to +/- 1%
  • User recalibrate-able
  • Slim profile design
  • Humidity & temperature readings
  • Three day high/low & averages for humidity & temperature
  • Fahrenheit/Celsius switchable
  • Secure magnetic mount
  • Battery included

Dimensions: Length: 4” Width: 1.3” Depth: 0.4”


Customer Reviews

Based on 1170 reviews
Kevin Z
Good product, great customer service

Cigar Oasis quickly replaced the first hygrometer I received that was just outside the adjustment limit, and the second one works great. I plan to buy more as needed for my other humidors.

Sal Taormina
Caliber IV

Received one that was reading way out of calibration over 6. Called customer service and was quickly replaced. New one works great. Thanks

Robert Simpson
Hydrometer replacement

Very happy purchased a Oasis IV Digital Hydrometer. First one did not read right and went over the 6% to correct it. I called and a replay was sent right away. Very pleased and would purchase from you again.

Mike Hickman
Works great

I didn't realize how dry my environment was. This is a valuable tool to have.


I received the Cigar Oasis Caliber IV Digital Hygrometer in a timely manner. The instructions are clear and easy as is using the hygrometer.I used the Boveda 75% Calibration packet to calibrate the hygrometer. The hygrometer reading was 6 points low which is the maximum adjustment for the device (+ 6 to - 6).The Cigar Oasis appears to work well and I will probably buy another one.