US Patent 11415453 Water leak/water flow detection system

A water monitoring device includes a housing, a graduated tube, a magnet, and a flow sensor. The graduated tube is positioned inside the housing and has a longitudinal axis and an inlet diameter less than an outlet diameter. The magnet is positioned within the graduated tube and configured to translate along the longitudinal axis of the graduated tube. The flow sensor is mounted within the housing and outside the graduated tube. The flow sensor is configured to detect the magnet and the position of the magnet along the longitudinal axis of the graduated tube correlates to a flow level through the water monitoring device.