Dew Point Meters determine the temperature at which condensation begins to form at a given barometric pressure, correlating to the amount of water vapor present in a gas. Conventionally, the Dew point meter captures air/gas in its sample chamber and then cooled down the temperature till it starts condensation. When that happens; it records the temperature and that temperature is the dew point temperature of that captured sample. The dew point is the temperature the air needs to be cooled to (at constant pressure) in order to achieve a relative humidity (RH) of 100%. The higher the dew point rises, the greater the amount of moisture in the air. ... This directly affects how ''comfortable'' it will feel outside.Humidity is the measure of the level of moisture vapor suspended in the air around you. ... The ideal relative humidity for health and comfort is somewhere between 30-50% humidity, according to the Mayo Clinic. This means that the air holds between 30-50% of the maximum amount of moisture it can contain.