湿度計の測定原理
In the measurement method, humidity is defined as the "quantity of the physical state". The humidity referred to in daily life is relative humidity, expressed in RH percent . In short, it is the percentage of saturated water vapor (saturated water vapor pressure) in a gas (usually air) that contains the same amount of water vapor (water vapor pressure) as its air.
湿度は古くから生命と密接な関係がありますが、量的に表現することは困難です。 絶対湿度、相対湿度、露点、乾燥ガスに対する水分の比率（重量または体積）などがあります。
