Holosteric barometer

{
  "id": "MLC-T-MET-006264",
  "term": "Holosteric barometer",
  "field": "Meteorology and atmospheric science",
  "definition": "An aneroid barometer that uses a sealed, evacuated metal capsule to measure atmospheric pressure. Changes in external pressure cause the capsule to expand or contract, and this mechanical deformation is transmitted to a needle that indicates the pressure reading. Unlike mercury barometers, it contains no liquid and is therefore more portable and less susceptible to damage from movement.",
  "url": "https://mlchart.com/terminology/meteorology/holosteric-barometer/"
}