Flow measurement instruments are used in a wide range of applications to measure the movement of fluid through a system. There are many types of fluid flow measurement gauges and monitors in existence, to accommodate different kinds of fluids as well as the varying process conditions and industrial applications in which they occur.

Flow measurement instrument is an action to measure the flow of liquids, gases and vapors using a flow measurement instrument or device, which measures the rate of flow or the quantity of flow. We measure flow in industrial processes, utility pipelines, HVAC systems, municipal water and wastewater, automotive, food and pharmaceutical plants, hospitals, commercial and retail stores, weather stations, our homes, and many more. Flow measurements indicate flow rate, flow total, flow velocity, the absence of flow, presence of flow, too much flow, too little flow, and flow direction.