What a TDS Meter will do for you is difficult to guess, but for water supplies that vary as much as mine can and does, it is a godsend. A quick dip of the meter into a water sample with both at room temperature gives an instantaneous reading of total dissolved solids in mg/L assuming the dissolved solid is sodium chloride. Now while this reading will not be accurate for those minerals in drinking water, it increases as the mineral content does and vice versa. This enables swift determination of the mineral levels every brew day and decide the action necessary to correct alkalinity. After treatmentalkalinity is measured using a Salifert kit and any necessary final adjustment is then made. In this way I know with decent accuracy the mineral content of the liquor used in every brew.chrisr wrote: ↑Sat Jan 05, 2019 12:18 pmI've ordered a Salifert alkalinity kit.
Eric, What does a TDS meter do for me, brewing-wise. I've just read up what it meaures, but how does that relate to brewing? (There's always something new to learn about brewing, isn't there?)
Do you mean take the sample later on in the mash? At what time? I know there are a lot of reactions under way in the first stages of the mash, and the pH will change. I thought 10 mins would see it settled.These 'problem' brews have been a different recipe every time; stouts to pale ales.
I mash around 2.5-3.0 l/kg.
I'm not trying to hit a precise pH, and I don't obsess about that, I just want it to fall into the optimum range, reliably.
10 minutes might be sufficient to obtain a good enough reading for your purposes, mine are taken later when they should be more consistent. However, I fly sparge intent to obtain near maximum extraction when it is essential to avoid pH rising above 5.7 or extract unwanteds and later readings help achieving that objective.
Stouts and pales have vastly different pH if mashed with similar liquors, but I'll assume you make provision for this. One observation is from what I have read, dark malts and roasted adjuncts used in North America appear to be far less kilned than those in common use in UK which would mean any fixed calculation embeded in software would be prone to giving spurious predictions.