Water flow sensor consists of a plastic valve body
Water flow sensor consists of a plastic valve body, a water rotor, and a half effect sensor. When water flows through the rotor, rotor rolls. Its speed changes with different rate of flow. The flow meter works on the principle of the Hall Effect. According to which, a voltage difference is induced in a conductor transverse to the electric current and the magnetic felid perpendicular to it. Here, the Hall Effect is utilized in the flow meter using a small fan propeller shaped rotor which is placed in the path of the liquid flowing. The liquid pushes against the fins of the rotor, causing it to rotate. The shaft of the rotor is connected to a Hall effect sensor. It is an arrangement of a current flowing coil and a magnet connected to the shaft of the rotor rotates.