Measure the amount of water vapor in gases, most often in air, in buildings, pipelines,
or as part of industrial or agricultural processes to ensure the optimal amount of moisture is present.
Application differ from agricultural, pharmaceutical, meteorology wide range of commercial and industrial processes.
High humidity also makes temperatures feel warmer, affecting comfort levels and straining HVAC systmes. Low humidity, on the other side, will dry things out and can lead to a static electricity build up.