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Never wonder if your digital hygrometer is accurate! The HygroSet FM has the same great adjustment features as the HygroSet I and II but is made specifically for exterior front mount humidors. The HygroSet FM is capable of being adjusted after calibration. Each click of the adjustment knob changes the humidity display (+ / -) by 1%. Adjust to the correct humidity, press the set button and your HygroSet is calibrated and ready to go!
Easy-set calibration Instructions.
Humidity accuracy +/- 2% from 20% to 90%
Temperature accuracy +/- 1 degree (displayed in Celsius or Fahrenheit)
10 Second refresh rate
Button cell battery included
Note: The HygroSet III is specially made just for exterior mount humidor models.