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The water flow sensor measures the flow rate of liquids using a magnetic hall-effect sensor. It consists of a turbine rotor inside a plastic housing that spins when water flows through it. The sensor generates a pulse signal proportional to the flow rate, allowing precise monitoring of water usage. It is commonly used in water dispensers, irrigation systems, and industrial fluid measurement applications. The module operates at low voltage and provides stable and accurate readings. The flow rate range varies depending on the sensor model, typically between 0.3 to 6 L/min. It is easy to interface with microcontrollers like Arduino and Raspberry Pi. The sensor helps in water conservation and automated water management systems.