Transmissometer

{
  "id": "MLC-T-MET-009765",
  "term": "Transmissometer",
  "field": "Meteorology and atmospheric science",
  "definition": "An optical instrument designed to measure the atmospheric transmittance or extinction coefficient over a specific path length. It operates by emitting a light beam and detecting the amount of light received at a known distance. These devices are widely used at airports to determine runway visual range (RVR).",
  "synonyms": [
    "telephotometer",
    "transmittance meter",
    "hazemeter"
  ],
  "see_also": [
    "runway visual range",
    "visibility meter"
  ],
  "url": "https://mlchart.com/terminology/meteorology/transmissometer/"
}