I once met a fellow brewer who had built his own RIMS system. He had two temperature probes in his mash vessel and had fiddled with the engineering of the heating loop and wort return. He had also tweaked his process, varying how the wort was heated, his pump speed, etc., and finally arrived at a point that he was proud of. He could hold his mash temperatures steady, within only 0.5 °F (~0.25 °C) over time or between different places in the mash (except for inside the heating loop, obviously). He could program virtually any step mash into his controller and the rig would carry it out. He was very proud of his accomplishment (as he should have been) and he offered me one of his beers. It was contaminated. [Read more…]
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