Simple Water Level Controller Circuit with Over Voltage and Under Voltage Cut OFF

I received the following contribution from Mr.Vineesh, who is one of the keen readers and followers of this blog. He is also an active hobbyist who likes to invent and make new electronic circuits. Lets learn more about his new circuit which was sent to me via email.Dear sir,Hope you fine. pls find the attached  ckt for a very simple and cheap water level controller. This  ckt is only a basic