Water flow sensor may be utilized for quantifying the flow of liquids, I. E. The consumption of liquids in production or domestic usage. For example it's possible for you to produce a robotic cocktail and can, Dispensing machine use this sensors to accurately measure components like soda, Water, Etc. Water flow sensor includes a water rotor, And a hall, A plastic valve body, Effect sensor. When water flows through rotor rolls, The rotor. Its speed changes with different rate of flow. The hall, Effect sensor outputs the corresponding pulse signal. Connection details red wire is 5vblack wire is gndwhite wire is pwm signal outputdescription lowest rated working voltage dc4. 5 5v, 24voperating humidity range 35%~90%rh no frost allowed pressure pressure 1. 75mpaexternal threads 1/2