Electrical substitution radiometer

{
  "id": "MLC-T-MET-005314",
  "term": "Electrical substitution radiometer",
  "field": "Meteorology and atmospheric science",
  "definition": "A precision instrument used to measure radiant power by comparing the heating effect of incident radiation with the heating effect of a precisely measured electrical power. It operates by maintaining a sensor at a constant temperature, first by absorbing radiation and then by electrical heating. This method provides highly accurate measurements of solar irradiance, often used for calibrating other radiometers.",
  "url": "https://mlchart.com/terminology/meteorology/electrical-substitution-radiometer/"
}