I am currently brewing on a 3V electric setup. I will post pictures of the current setup. I would like to transform it into an automated low oxygen brewery. I am thinking that I should be able to weld latches onto the tun and kettles so they can be purged with N2 and I will use a pre-boil for strike water. My question comes with the electronics. I am a nuclear electrician on submarines and have a working knowledge with PLC's and VME systems. I would like in process monitoring of dissolved O2, ph and specific gravity. It looks like the atlas scientific industrial ph probe and dissolved O2 probe should talk fairly easy with an Arduino setup. My concern is the specific gravity. I see everyone is using a micro motion mass flow meter and I would like help choosing a correct model with the correct remote transmitter. I also need help choosing all of the correct Arduino equipment to accomplish all of this. I have studied the prints of the sample systems over at brucontrol but don't want to waste a bunch of money buying things I don't need as I tend to do. Any help would be greatly appreciated.