Relative Humidity 04 (RH)
Relative Humidity 04 (RH) : The ratio, expressed as a percentage, of the amount of water vapour or moisture in the air to the maximum amount of moisture that the air would hold at the same dry-bulb temperature and atmospheric pressure (RH can vary from 0 to 100%). For example, 60% RH means that the air contains 60% of the moisture it is capable of holding. Popularly called humidity