Liquid flow rate sensor

i need connect a yf-s403 to an arduino one, i need help please

Use wire.

It is an Arduino Uno not a one, even though Uno is Itialian for one, you don't translate that bit.

Please post a link to your sensor using the chain icon then people with mobile devices can use it.

One datasheet states that the sensor has three wires. Ground (black), +5volt (red), and digital out (yellow). Digital levels (0.5v/4.5v) from a hall IC. Not clear how many pulses/liter. Leo..

Check this nearby conversation. I don't think you need to use wire, I'm pretty sure nobody else does.

http://forum.arduino.cc/index.php?topic=325842.msg2250876#msg2250876.

The pulse per litre is often on the device, or the supplier should advertise it. You can calibrate it by simply changing the conversion factor. I imagine you could test it with a known quantity.

Nick_Pyner:
Check this nearby conversation. I don’t think you need to use wire, I’m pretty sure nobody else does.

Wire - as in metal conducting material usually covered in an insulated material.