This article describes the construction of a volumetric laboratory scale two chemicals in a range of 0.0033 cm3 to 50 cm3 Its construction was necessary to adjust two peristaltic pumps of the same technical features, implement a data acquisition card with USB communication to a PC with the PIC18F4553 microcontroller to enable the implementation of the control action of the peristaltic pumps and finally develop an interface communication with the user in the programming language Java. For validation 2 Universidad de la Amazonia, Facultad de was considered a calibration procedure volumetric material known to measurement. uncertainties dispenser. Finally achieving a system of chemical dosing with combined standard uncertainty and uncertainty cm of 0.00060 ± 0.00120 cm expanded in dosing, with a coverage factor k equals 2 for a confidence level of 95%.