Mass flow meters include those that measure gases and those that measure liquids. Mass flow meters measure the mass of a gas or liquid that flows through a pipe in a given unit of time. Mass flow meter manufacturers include Arizona-based Alicat Scientific and California-based Sierra Instruments.
Mass flow meters for gases can measure environmental gases, gas mixtures and toxic and corrosive gases, such as ammonia, hydrogen sulfide and silane. Alicat's MS Anti-Corrosive series of mass flow meters are made of durable 316L stainless steel. Sierra Instruments' line of SmartTrak flow meters measures gas flows of 10 standard cubic centimeters per minute to 1,000 standard liters per minute.
Mass flow meters for liquids measure the flow rate of water and other liquids. The Alicat L-series flow meters take laminar differential pressure measurements that are internally compensated for linear results over a wide range of flow rates.