Which instrument is specifically designed to measure extremely low atmospheric pressure, commonly used in weather forecasting?

💡 Solution & Explanation

An aneroid barometer is specifically designed to measure extremely low atmospheric pressure changes using a flexible sealed metal chamber without any liquid content. Alternative devices like hydrometers measure liquid density, while pyrometers measure very high temperatures from a distance. Barometric pressure readings obtained through aneroid mechanisms are fundamental indicators for tracking impending storms and short-term weather fluctuations.