I'll go into detail on what you should look for when choosing parts as needed. In some cases the parts are from the internet and anyone can get them while others are local surplus and you might need to sub. So here I am going to present the parts that I used and you can use them as a guide for sourcing your own. Also, depending on your system you may be able to substitute a lower cost lesser performing part safely. If you stick to the recipe strictly you may find that you cannot source the specified part locally or economically. The key to designing this kind of control system on the cheap is flexibility and availability. If that sounds good to you, then read on! I can attest to the fact that this control panel works and makes great beer. Here I will show you how I redesigned Kal's control panel with cost in mind, bringing the cost down from around $1500 to $250 without compromising safety and with only a few compromises in function. You can substitute fittings and pots and pumps to reduce system cost, but the heart of the 'Electric Brewery' system and one of the costliest is the control panel. This is job security which is bred into all engineering types. Also, Kal is an engineer by training, and as a fellow engineer I cannot possibly leave well enough alone and must change his design. Kal has designed a top-notch, no-compromises system that is safe, enjoyable and easy to use. It uses electric hot water heater elements, a three-kettle two-pump setup, and a process control panel to bring your home brewing to a new level of awesome and easy. This is the best homebrew setup out there, well thought out, well designed and effectively open source. If you haven't then get over there and read up. If you are into home brewing then you have likely heard of ' The Electric Brewery' created and run by a fellow named Kal.

Electric panel box diagram