Level Control System

CONSTRUCTION

1)The liquid level control sytem is mainly consists of a tank (plant), which is filled with liquid.

2)The liquid sensor(transducer) is placed in a liquid tank, which senses the level of the liquid.

3)That sensor is connected to the transmitter.

4)Again the transmitter is connected to the controller, where the signal is to be controlled and compared with the set point value.

5)The controller is connected to the control valve, which controls the flow of liquid.

WORKING

If the level of the liquid is increased, that level is sensed by the liquid sensor, where the liquid level is converted into electrical signal. Then the electrical signal is transmitted to the transmitter.

Then transmitter passes the signal to the controller. In controller, the signal is compared with the set point value.

And if the difference is more, then control valve will be closed by the controller. The liquid level of the tank will be decreased by the outlet valve until the level reaches to the set poin value.

If the level of the liquid is decreased, that level is sensed by the liquid sensor, where the liquid level is converted into electrical signal. Then the electrical signal is transmitted to the transmitter.

Then transmitter passes the signal to the controller. In controller, the signal is compared with the set point value. If the diffrence is less, then controlled valve will be opned by the controller.

The liquid level of the tank will be increased until the level of the liquid reaches to the set point value.

Author: Laxmi Omprakash Singh