The main aim of this system is to help the industry to move smoothly and avoids the break down and damages to the equipments. Chemical level sensing is used for the purpose of liquid discharge and maintaining minimum required levels. A systematic approach to design and realize a volume based liquid mixing system using less man power and low cost microcontroller. This paper introduces a systematic approach to design volume based liquid mixing system using low cost microcontroller. The primary function of this system is to mix different liquids of required ratio. They are 1) Electronic sub system 2) Mechanical sub system. In this paper the electronic sub system is developed with the help of a Atmel AT89C51 microcontroller for controlling discharge rate of solenoids. The mechanical sub system consists of two geared DC motors to allow the liquids in required ratio for mixing.