By counting the pulses from the output of the sensor, we can easily calculate the water flow rate (in litre/hour – L/hr) using a suitable conversion formula. The Arduino Sketch (code) uses the ...

It runs on an Arduino MEGA 2560 PRO (or similar microcontroller) and supports a wide array of additional hardware including pressure transducer, water level sensor, flow meter, OLED display ...

have a look at [Josh EJ]’s Sensible Flow project. It contains designs for a set of sensors that measure your water consumption and a convenient little display that shows the total amount consumed.