Water flow sensor can be used to measure the flow of liquids, i.e. the consumption of liquids in industrial or domestic usage. For example you can make a robotic cocktail dispensing machine, and can use this sensors to accurately measure components like Soda, Water, etc. Water flow sensor consists of a plastic valve body, a water rotor, and a hall-effect sensor. When water flows through the rotor, rotor rolls. Its speed changes with different rate of flow. The hall-effect sensor outputs the corresponding pulse Signal.
I believe using this should be simple, you just need to connect to Arduino interrupt pin 2, and can measure the number of PWM pulse/interrupt per unit of time. The water flow would be directly proportional to the number of measured pulses.
- Red wire is +5V
- Black wire is GND
- White wire is PWM signal output
- Cummulative flow conversion 1L(H2O)=516 pulse, accuracy 10%
- Flow characteristic F=10Q, F:HZ, Q:L/min, positive or negative 10%
- water quality requirement drinking water health standards, 0~60 degree celsius
- size 1/2Inch Plastic
- flow range 1~30L/MIN
- Hydraulic pressure less than or equal to 1.75 MPa
- voltage DC4.5~18V, less than or equal to 15mA, customised 24V
- Insulation resistance more than 100M ohms
- Electrical strength AC500V, 50HZ
- Output level Rated voltage DC5V, high level more than 4.5, low level less than 0.5V
- Pulse duty cycle 50%
Note: The color of the sensor is mostly white.