The sample bottles for the chemical reactions are mounted inside specialized containers made by a 3D printer. The container is affixed with a square barcode-like marker called an ArUco marker. The ArUco marker, developed for robotics, not only enables the identification of the labeled object but also allows the estimation of three-dimensional relative coordinates between the marker and the camera. The robotic arm and dispensing device operate by referencing the position of the ArUco marker. Such simple yet accurate robot control based on visual feedback allows for the construction of a robust system that is adaptable to changes in the experimental environment. The system features liquid handling, observation of samples, and moving containers (Fig. ). Leveraging its high customizability, in this study, we have incorporated a four- unit stirrer into the machine. We adopted a mechanism to control the dispensing operation of a universal 1 mL micropipette with a servo motor, controlling the volume of liquid aspirated by the depth to which the pipette's extrusion button is pressed. To determine how accurately the unofficial usage, not anticipated by the manufacturers, could control the volume aspirated, we experimentally verified the relationship between the button's pressing distance and the volume of liquid (Fig. ). Water was chosen as the standard sample for preparing the calibration curve, and the volume of liquid was estimated from the weight and specific gravity. Linearity was confirmed between the aspirated volume and the pressing distance, with an average error of 3.4 μL.