Dewpoint hygrometer

{
  "id": "MLC-T-MET-004968",
  "term": "Dewpoint hygrometer",
  "field": "Meteorology and atmospheric science",
  "definition": "An instrument that directly measures the dewpoint temperature by cooling a polished mirror surface until condensation (dew or frost) forms on it. A sensor detects the onset of condensation, and the temperature of the mirror at that moment is the dewpoint. These hygrometers provide highly accurate measurements of atmospheric moisture content.",
  "url": "https://mlchart.com/terminology/meteorology/dewpoint-hygrometer/"
}