Absorption hygrometer

{
  "id": "MLC-T-MET-003203",
  "term": "Absorption hygrometer",
  "field": "Meteorology and atmospheric science",
  "definition": "A hygrometer that infers the water vapor content of air from absorption, either by the uptake of vapor into a hygroscopic medium, as in the chemical type where a desiccant takes up moisture from a measured volume of air and is weighed, or by the absorption of ultraviolet or infrared radiation by the vapor along a short optical path. The optical types, such as the Lyman-alpha hygrometer, respond quickly enough to follow rapid humidity fluctuations in turbulence studies.",
  "synonyms": [
    "chemical hygrometer"
  ],
  "see_also": [
    "gravimetric hygrometry"
  ],
  "url": "https://mlchart.com/terminology/meteorology/absorption-hygrometer/"
}