Relative humidity Relative humidity is absolute humidity and the maximum humidity ratio, it shows the value of the saturation vapor how high It is the% of the units. 100% relative humidity of the air is saturated air. The relative humidity is 50% of the air contain the same temperature of the air saturation point half of the water vapor. 100% relative humidity of the air over the water vapor condensation from the general. With the air temperature can be increased with water will be, in other words, in the same amount of the steam temperature rising relative humidity decreases. Thus providing relative humidity at the same time it must also provide temperature data. By relative humidity and temperature can also calculate dew point. Following is the relative humidity formula : The symbols are : ¦Ñw ¨C Absolute humidity, the unit is g / m 3  ¦Ñw,max ¨C The maximum humidity units g / m 3  e ¨C Vapor pressure units hectopascals  E ¨C Saturation vapor pressure, the unit is hectopascals  s ¨C Over the wetlands that units are g / kg  S ¨C Wetlands than the maximum units of g / kg  Air humidity  Said the air of moisture content and humidity levels of physical quantities. Ground moisture, is 1.5 meters from the ground thermometer screen height measured the air humidity. Common vapor pressure, relative humidity, dew point temperature and humidity to indicate the size.