Hi Suman,P1,P2,P3 are | Electronics › Electronics › explanation of Water level controller cum indicator circuit › Hi Suman,P1,P2,P3 are June 14, 2012 at 5:09 am #8033 AmrithParticipant Hi Suman, P1,P2,P3 are different levels of water to be sensed. P1 indicates Point 1 P2 indicates Point 2 P3 indicates Point3 No need of connections just leave it floating, when water level touches at that particular point you will get an output.
