Dakwan, are you referring to PLC's? I worked for a company some years back where we made a powder ferrite product from a blend of acid and another product I cant remember, which were sprayed into a 40 foot tall, 20 foot wide venturi furnace. As you can imagine we had air controlled valves everywhere controlling flow of acid and other liquids. There were also monitors from heat to ph and all of these processes were controlled by an operator in the control room.
When we upgraded our computer system we got new plc's in our cabinets and I remember the nightmare of getting all that wiring hooked up right. So what software are you going to run all this with?
This is quite an undertaking and I can certainly appreciate why you want to do it. I understand what you are wanting and why and I wish I had the technical ability to do this because I like computers and data collection, and control processes. Having that kind of control of a process is just plain fun to me and I eventually want to get into the position to have all my data tracked and controlled from my computer. Will I go as far as you, who knows. I dont know if I can afford it for one thing and I would have a serious learning curve to say the least to get it all hooked up correctly but maybe something like Apex would be more doable for me but I like your vision and please keep us updated, also with pics because we all love pics. Good luck!!!