Absolute cavity radiometer

{
  "id": "MLC-T-MET-003180",
  "term": "Absolute cavity radiometer",
  "field": "Meteorology and atmospheric science",
  "definition": "A highly precise instrument designed to measure the total solar irradiance by converting absorbed radiation into heat, which is then measured electrically. It operates by maintaining a black-coated cavity at a constant temperature while exposed to solar radiation, comparing the electrical power needed to achieve this with and without radiation. These radiometers are used as primary standards for solar radiation measurements.",
  "url": "https://mlchart.com/terminology/meteorology/absolute-cavity-radiometer/"
}