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The YF-S402 water flow sensor is a device that is used to measure the flow rate of water. It consists of a turbine-type rotor that is placed in the water stream, and as the water flows past the rotor, it causes the rotor to spin. The sensor measures the speed of the rotor and converts it to a flow rate. The sensor has a digital output, which means that it provides a digital signal that can be read by a microcontroller or other host device. The frequency of the pulses is proportional to the flow rate of the liquid passing through the sensor. That digital signal, whose frequency is in the range between 0Hz and 100Hz, can be read directly through one of the digital input/output pins of a microcontroller. ID 8.5mm / OD 11mm.
The water flow sensor measures the rate of a liquid flowing through it. The YF-S402 water flow sensor consists of a plastic valve body, flow rotor, and hall effect sensor. It is usually used at the inlet end to detect the amount of flow. When liquid flows through the sensor, a magnetic rotor will rotate and the rate of rotation will vary with the rate of flow. The hall effect sensor will then output a pulse width signal. Connect it to a microcontroller and you can monitor multiple devices such as your coffee maker, sprinkler, or anything else, and control the water flow rate to suit your needs.
Sensor Type | Water Flow Sensor |
Model | YF - S402 |
Frequency Range | 0Hz and 100Hz |
Inlet diameter | 8mm |
Outlet diameter | 11mm |
Dimensions | 5 x 4 x 3 cms |
Weight | 50 grams |
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Typical applications include:
Water Management Systems: For irrigation and water treatment.
Home Appliances: Monitoring water usage in washing machines and dishwashers.
DIY Projects: Custom water flow monitoring systems.
Industrial Automation: Measuring and controlling water flow in industrial processes.
excellent working. Great product
Working really fine as expected
Hey guys really a nice product and you can utilize in so many application.........
Sturdy generic sensor. works as advertised. Worked with my NODE MCU as well as Arduino
Very happy with delivery and product
Great product. Works excellent.
great product highly recommended.
It is very great full sensor for project
Works Perfectly - Thanks!
Good product in best price.
Connected a 9v battery and buzzer and bed room switch in series and it works excellent.
Hello, the inlet and outlet sizes, the YF-S402 has a G1/4 (1/4 inch BSP) thread size12, not G3/8. Thank You
Hello, for YF - SN402 water flow sensor inlet diameter is 8mm and outlet diameter is 11mm.