Diffusion hygrometer

{
  "id": "MLC-T-MET-005011",
  "term": "Diffusion hygrometer",
  "field": "Meteorology and atmospheric science",
  "definition": "An instrument that measures atmospheric humidity by observing the rate at which water vapor diffuses through a porous membrane or into a dry gas stream. The diffusion rate is proportional to the water vapor concentration gradient. This type of hygrometer is often used for precise measurements in controlled environments.",
  "url": "https://mlchart.com/terminology/meteorology/diffusion-hygrometer/"
}