Water flow sensor consists of magnetic core, rotating impeller, external casing and sensor and a hall-effect sensor. When water flows through the rotor, rotor rolls, it activates the magnetic core to trigger switch action speed changes with different rate of flow. The hall-effect sensor outputs the corresponding pulse signals, users can get the flow speed via detecting the pulse. It is suitable to detect flow in water dispenser or coffee machine. There are also lots of other water flow sensors in other diameters for your choice.
The water flow sensor outputs pulse proportional to the water flow with: Pulse Frequency = Flow *7.5. That is, if the output frequency is 48, then the water flow: 48/7.5= 6.4(L/min) Connect the water flow sensor to microcontroller as belows:
The quality is good. So far, work performance and the accuracy of the goods is good.
After used, I think you should pay attention to the following two points:
first, you need to recognize the water flow direction when you installing the water flow sensor.
second, I suggested that you can installed a layer strainer on the nozzle to avoid particles and debris into the sensor.
Overall, I was happy with this purchase. (Posted on 5/10/2017)