YF-S401 Water Flow Sensor 0.3-6L/min

CreateLabz StoreSKU: 20-065


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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.


  • 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: ≤10 mA  (DC 5V)
  • Operating Temperature: ≤80
  • Liquid Temperature: 120
  • Operating Humidity: 35%-90%RH
  • Water Pressure: ≤0.8MPa
  • Storage Temperature: -25- + 80C
  • Storage Humidity: 25%-95%RH


  • Red: Power In
  • Black: Ground
  • Yellow: Signal Output

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