Robodo YF-S401 Water Flow Meter Hall Sensor Electronic Components Electronic Hobby Kit

"Water flow sensor consists of a plastic valve body, a water rotor, and a hall effect sensor - when water flows through, the internal rotator will change its speed with different rate of flow and hall effect sensor outputs the corresponding pulse signal. Use with laser cutters or CNC to measure if and how much water is flowing through laser tube or CNC spindle for cooling. Specifications Working Voltage: DC 5V~24V Maximum Working Current: 15mA @ 5V DC Flow Rate Range: 0.3~6L/min Connection: 6mm (external diameter) Inlet Water Pipe Diameter: 2.5-4mm Load Capacity: ?10mA (DC 5V) Operating Temperature: ?80? Liquid Temperature: ?120? Operating Humidity: 35%?90%RH Water Pressure: ?2.0MPa Storage Temperature: -25?+ 80? Storage Humidity: 25%?95%RH Connections Red: Power In Black: Ground Yellow: Signal Output"