In the Four Tank System It is desired to control the liquid levels of the both lower tanks by changing the water flux of two DC pumps. The control hardware is a cRIO-9024 programmed with LabView (NI). It was developed at LCA. The following video presents better details on how it works.
![](https://sites.usp.br/lca/wp-content/uploads/sites/238/2017/02/IMG_1561.jpg)