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Magnetic stirrer hotplate is a laboratory equipment which is used to heat and homogenize any chemical solvent. This equipment is usually used in chemical, microbiology and pharmacy laboratory. It is equipped with stirrer which is made up from magnetic stir bar. Our proposed magnetic stirrer hot plate controller uses ATMega16 microcontroller and equipped with temperature sensor MLX90614 to measure and monitor chemical solvent temperature and using DC (Direct Current) motor as a mover of stirrer. This tool is designed to have two type menus: automatic and manual. If using the automatic menu, the user only selects the mixing of the solution in the automatic menu. On the other hand when manual menu is selected temperature (30-60 celcius), stirring velocity (400-1600 rpm) and stirring time (1-30 minute) which can be seen at LCD display. The simulation result of PID (Proportional Integral Derivative) controller indicates stable condition when when Kp = 0,011, Ki = 0.1, and Kd = 0.000012. Keywords—hot plate, magnetic stirrer, infrared MLX90614, PID controller.

Designing Magnetic Stirrer Hot Plate Using Contactless Infrared MLX90614 Temperature Sensor Based On PID Controller