YF-S401 Water Flow Sensor

SKU: OMP-S038 Category:



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.

The sensor has a 7mm coupling on both sides and is therefore easy to connect to a 6mm hose.


Voltage range: 5-24V

Working temperature: -25-80oC

Pulse frequency per L/min: 98Hz

Measuring range: 0.3-6L/min (with an accuracy of +-10%)

Maximum water pressure: 0.8MPa

Voltage pulse (with 5V as input voltage): 4.7V

Duty cycle pulse: 50% +-10%