A flow sensor is a device that measures the flow rate of liquids or gases in a system. It helps monitor how much fluid is moving through pipes or channels, which is essential for various applications like water management, HVAC systems, and industrial processes. By providing real-time data, flow sensors ensure that systems operate efficiently and safely. These sensors can be found in many everyday items, such as water meters and fuel injectors. They come in different types, including turbine, ultrasonic, and magnetic flow sensors, each designed for specific uses and environments. Understanding flow sensors is crucial for optimizing resource usage and maintaining system performance.