Cyanometer

{
  "id": "MLC-T-MET-004821",
  "term": "Cyanometer",
  "field": "Meteorology and atmospheric science",
  "definition": "An instrument designed to measure the blueness of the sky, typically by comparing the sky's color to a graded series of blue shades. This device provides a subjective assessment of atmospheric turbidity and the amount of scattering by aerosols and molecules. Horace-Bénédict de Saussure invented an early version in the late 18th century.",
  "url": "https://mlchart.com/terminology/meteorology/cyanometer/"
}