Integrated Instrumentation Made Simple

Relative Humidity

Relative humidity is the amount of moisture in the air compared to what the air can "hold" at the current temperature.

When air cannot "hold" anymore moisture at its current temperature, the moisture droplets condense into dew.

Dew Point

If the air is gradually cooled while maintaining a constant moisture content, the relative humidity will rise until it reaches 100%.  The air temperature at 100% Relative Humidity is referred to as the "dew point".  If the air is cooled further, excess moisture that cannot be held in the air, condenses.

Desirable Levels Of Relative Humidity

The Average Human Body Is Comfortable Within A Range Of Relative Humidity, Between 20%-60%.  45% Percent Is A Level Commonly Enjoyed By Many People.

Simple Science To The Human Body's Temperature Regulator

Skin Is An Organ That Evaporates Moisture To Regulate The Body's Temperature.  This Makes Us Very Sensitive To The Level Of Humidity In The Air Around Our Body.

As The Air Reaches 100-Percent Relative Humidity, The Evaporation Process Slows And Stops When The Relativity Humidity Reaches 100%.  This Causes The Body's Cooling Process To Slow And Causes The Body Temperature To Rise!  This Becomes Very Uncomfortable And Dangerous To Life And Health.

As The Relative Humidity Drops, The Evaporation Process Works Better Making The Body Feel Cooler Than The Actual Temperature Of The Surrounding Air.

Practical Examples:

75F/24C Degree With Relative Humidity At 0%

 > The Air Would Feel More Like 69F/21C Degrees!

75F/24C Degree With Relative Humidity At 100%

 > The Air Would Feel More Like 80F/27C Degrees!