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  1. Barometer - Wikipedia

    Many measurements of air pressure are used within surface weather analysis to help find surface troughs, pressure systems and frontal boundaries. Barometers and pressure altimeters (the most …

  2. How Is Barometric Pressure Measured and Why? - HowStuffWorks

    Feb 27, 2024 · What Is a Barometer? A barometer is a scientific instrument designed to measure barometric pressure. Barometers as we know them date back to 1643 when the Italian inventor …

  3. Barometer | Definition, Types, Units, & Facts | Britannica

    Nov 12, 2025 · A barometer is a device used to measure atmospheric pressure. Because atmospheric pressure changes with distance above or below sea level, a barometer can also be used to measure …

  4. BAROMETER Definition & Meaning - Merriam-Webster

    The meaning of BAROMETER is an instrument for determining the pressure of the atmosphere and hence for assisting in forecasting weather and for determining altitude.

  5. How Barometers Measure Air Pressure - ThoughtCo

    May 7, 2025 · A barometer is a widely used weather instrument that measures atmospheric pressure (also known as air pressure or barometric pressure) -- the weight of the air in the atmosphere. It is …

  6. What Is A Barometer, How It Works, Where To Place It ...

    Jun 27, 2025 · A barometer is defined as a meteorological instrument used to measure air pressure in the atmosphere. It forms a crucial part of any weather station and is primarily used with other …

  7. Barometer - National Geographic Society

    Oct 24, 2023 · A barometer measures atmospheric pressure in units of measurement called atmospheres or bars. An atmosphere (atm) is a unit of measurement equal to the average air …