Mælingarregla rakamælisins
In the measurement method, humidity is defined as the "quantity of the physical state". The humidity referred to in daily life is relative humidity, expressed in RH percent . In short, it is the percentage of saturated water vapor (saturated water vapor pressure) in a gas (usually air) that contains the same amount of water vapor (water vapor pressure) as its air.
Raki hefur lengi verið nátengdur lífinu en erfitt er að tjá hann í magni. Það eru alger raki, hlutfallslegur raki, daggarmark, hlutfall raka á móti þurru gasi (þyngd eða rúmmál) og svo framvegis.
