The general objective of the present investigation was: being designed for, constructing and installing an equipment to accomplish the study of the automatic control of the level of liquid in two tanks adequately, for which it became elaborate firstly a sketch of the aforementioned team with the aim of analyzing the functioning of every one of their main components, which were: a PLC, an electric pump, two solenoid valves, an elevated tank, a tank that represented a powerhouse of liquid, a tank cistern, two breakers with float and an interface of communication. Straightaway, was used the software Zelio Soft V5.4.2, in order to elaborate and to play-act the best-suited logic circuit for the automatic control of the level of liquid in two tanks. The aforementioned logic circuit, it has served to determine the quantity of physical receipts and expenditures used in the PLC, the same ones tha...