👉 A gazometer is a type of instrument that measures atmospheric pressure. It consists of a device that can be attached to a vehicle or other stationary object, such as a car or boat, and used to measure the pressure difference between two points on the ground (known as the reference point) and the pressure at an unknown location in the atmosphere. Gazometers are commonly used for various purposes, including monitoring atmospheric conditions during weather events, detecting leaks in pipelines, measuring air quality, and evaluating the efficiency