Mass flow meters are devices used to measure the mass flow rate of liquids and gases. They work by determining the amount of mass passing through a specific point in a system over time. This measurement is crucial in various industries, including oil and gas, food and beverage, and chemical processing, where accurate flow rates are essential for efficiency and safety. These meters can operate using different principles, such as Coriolis or thermal methods. Coriolis flow meters measure the change in vibration frequency of a fluid, while thermal flow meters assess heat transfer to determine flow rates. Both types provide reliable and precise measurements for various applications.