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%.
- 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