What type of system and what degree of automation do you want to achieve?, second question how much time and money are you willing to invest in an automated system. On the easier end of the scale is the BCS-460 , great system for most all of the basic brewing systems, medium difficulty would be the brewtroller which is still under development and should be configurable for most all types of systems, far end would be digital - analog I/O hardware and roll your own software or you can purchase packaged plc interface programs.