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Fitup Hygrometer Ivory 108mm
HY108IV 108mm diameter Cream Dial
Accurate to within 3%. Minimum hole size 85.5mm. Gold Bezel. Used to measure humidity. Humidity is measured in percentage; it compares the amount of moisture or water vapour in the air. Relative humidity is measured on a scale of zero to 100 ; the higher the number the more moisture in the air.