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: ≤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


Red: Power In
Black: Ground
Yellow: Signal Output

Reviews about Water Flow Sensor YF-S401
Average rating: 0 reviews
Total reviews: 0
Write your own review on this product.
Write a review
Sort by:

Write a review

Please login or register to review

Water Flow Sensor YF-S401

  • 0.3-6L/min

  • Product Code: Water Flow Sensor: YF-S401
  • Availability: In Stock
  • $5.95 USD

Related Products

Inductive Proximity Sensor PL-05N

Proximity Sensor PL-05N NPN

 For Laser or CNC Machines

$7.99 USD

DHT22 Digital Temperature & Humidity Sensor

DHT22 Digital Sensor

 Temperature & Humidity

$5.00 USD

Raspberry Pi GPIO Extension Board

Raspberry Pi GPIO Extension

 with Ribbon Cable

$4.95 USD $0.95 USD

Temperature Control Thermostat Switch

Thermostat Switch 60C Trip Point

 60C - 140F

$0.95 USD

Tags: flow sensor, hall effect, arduino, water, 0.3l, 6l/min, sensor, laser cutter, cnc sensors yf-s401