Cigar Oasis has always been known as the maker of the most accurate hygrometers in the cigar industry and beyond.
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. Gauges between 20-90% Relative humidity (RH)