The H2Orb is an eco-gadget that can be installed between the water supply and the toilet hose, with a special toilet bowl sensor and a tank sensor unit. With all of these sensors, the H2Orb can detect excessively running flushes, toilet bowl overflows and checks for leaks. The device costs just $127, but will pay for itself in a single year by preventing leaks.
When a leak or overflow is detected, the H2Orb will shut off the water supply to the toilet and report a status message on its display. This quickly minimises the damage that would otherwise be caused by leaks and overflows. Of course, by stopping leaks and overflows, you’re also saving water. Saving water reduces your water bills and does the environment a little good too.
Source: CleanTechnica