Thermoscope

{
  "id": "MLC-T-MET-009619",
  "term": "Thermoscope",
  "field": "Meteorology and atmospheric science",
  "definition": "An early instrument used to indicate changes in temperature, but without providing a quantitative measurement on a standardized scale. It typically consisted of a bulb of air connected to a tube immersed in water, where changes in air volume due to temperature caused the water level to rise or fall. Unlike a thermometer, it lacks a calibrated scale for precise readings.",
  "url": "https://mlchart.com/terminology/meteorology/thermoscope/"
}