When not in Use - in everyday life people often multitask.i.e the do many things at the same time. And there are times whereby you wanna fill a container with water while doing something else, like run the water into a bath tub while undressing in the bedroom. In most cases the water often goes to the level we did not want.
This device will be placed in the wall of any container to be filled with water, warns you once the water reaches the level you want. it will flash a red light and sound a siren.