Level controller is switch on the pump when overhead tank is empty and switch off when either overhead tank is full or underground tank is empty. Apart from this it has provision to switch off the pump automatically at pre-programmed time of the day as well, just the way your pump man does now. And the importance of time control we need not to tell you! You know how you missed 7. 02 local the other day because your pump man started the pump 15 minutes late. As an additional feature one time dependent switch is provided so that your common society lights can be controlled from the same unit as well