Automatic water level controller circuit with dry run protection for sump and overhead tank using single npn transistor and ball type float switch.
Circuit Sponsor: kjmindia.in
Water level controller is necessary for many reasons. Water level can be monitored and controlled automatically without any human intervention. Thus it saves water wastage, electricity and time. This can be used both in industries and houses. The circuit I am going to share in this post controls water level in the overhead tank or any tank. Can be used in tanks of any liquids (eg.oil) provided it should not be hot. The cost of making this circuit is very low and can be assembled on a general purpose board if you are using it for your personal use. For commercial purpose, you can buy one from here.
Working of the circuit: