PLC BASED WATER LEVEL CONTROL SYSTEM

A PLC is a digital computer used for automation of electromechanical processes and industry purpose.This is a very most important for automation purpose.so that this type project safe a water and any type of boiler automation system at which some time. I have used Siemens plc for water level control system. In this type plc is a very simple programming language so that this project used a four float switch sensor. Two float switch sensor is used a upper tank and two float switch sensor is used bottom tank.It is on this platform that the need to minimize or check water wastage arouse. Water is a free gift of nature but due to its indispensability to human existence; it should be conserved for the purpose of constant availability or sufficiency. Moreover, in order to take a good care of this problem of wastage, there is need for the construction of water level controller this will guide against unnecessary wastage of water, for it will make a reasonable quantity of water to be used a any time. In this project, effort has been made to construct a water controller that is capable of controlling the electric water pumping motor operation in regard switching on or off at predetermined level of water in the storage tanks or reservoirs. This project also gives the clarity of advantage of using an automatic method of controlling level over human or manual control method. SENSOR:Float Sensors contain hermetical sealed Reed Switch in the stem and a permanent Magnet in the Float. As the Float rises or falls with the level of liquid the Reed Switch is activated by Magnet in the Float.A float switch is a device used to detect the level of liquid within a tank. The switch may be used to control a pump, as an indicator, an alarm, or to control other devices. One type of float switch uses a mercury switch inside a hinged float. Another common type is a float that raises a rod to actuate a micro switch. One pattern uses a reed switch mounted in a tube; a float, containing a magnet, surrounds the tube and is guided by it.