Hi everyone!! We are Solar team. Our idea is reduce the trash in the sink because this is one of the dangerous disease vectors. We purpose to put a sensor inside the galleries to clean solid trash, because this solids can stuff the sinks. But you are asking how we can put this sensor, we will put inside the gallerie and when the trash almost near from sensor, it will be send a signal to the central operation of water treatment company, they will clean the trash and the world can be better without disease!!