Humidity,Dew Point and Dryness

This paper mainly introduces the concepts of humidity,dew point and degree of dry ness.These concepts have close relations with project design,products storage and environment test,so it′s necessary for us to know the concept differences of them.The authors did some conversions with formula for absolute humidity,and compared the results with authoritative data.It proved the formula for absolute humidity is correct.This paper contains some examples of conversion and a table of saturated humidity between-80℃ and-21℃.