A commercial laboratory flotation machine (Denver Model D-12) has been automated for ease of operation and reproducibility. The major features of the system include two plexiglass cells of 4- and 2-1 capacity which are interchangeable for rougher and cleaner flotation, respectively, an electronic level controller and an air-flow rate controller. The level controller can be used for either pulp-level or froth-level control by adjusting the threshold setting. Two mechanical paddles on the sides of each flotation cell can be controlled to adjust the rate of froth removal. Test results demonstrate the reproducibility of the data obtained with the equipment.