Currently some of the equipment in the laboratory is still using manual charging. Then a conveyor filling vessel was made in the laboratory automatically. Previously the conveyor was designed to use an on-off control system but there were still shortcomings in the filling process which was not as expected. Designed vessel fillor conveyor using PID control system. By using the PID control system the process of filling the solution in a vessel is obtained by filling results precisely, thoroughly, and safely. Semi automatic vessel filling conveyors are designed using the 2016 AUTODESK INVENTOR program. The process of making conveyor machines goes through several processes of preparing materials, cutting processes of materials, welding processes, mounting frames, mounting components, and making electrical circuits. In this tool installed several main components including: ultrasonic sensors, Arduino UNO, flowmeter sensors, selenoid valve, conveyor belts, rollers, pumps, DC motors, relays, and gearboxes. All components will be installed in a framework that uses angled iron, CNP canal, and acrylic with a thickness of 5 mm. The vessel filler conveyor can transport several vessels in sequence. Each vessel has a maximum liquid capacity of 500 ml. Bejan filler has dimensions of length 100 cm, width 30 cm and height 40 cm. The results of testing the work of the vessel filler in the process of filling the solution, in experiment 1 obtained an average of 443.33 ml in 61.29 seconds, experiment 2 obtained an average of 443.33 ml in 62.4 seconds, and experiment 3 was obtained an average of 443.33 ml in 61.7 second.