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I brewed a dry stout a few days ago. Here is a log-plot of the bubble frequency. The various fermentation phases (as described in, e.g., Palmer's "How To Brew") are clearly visible as straight lines, indicating exponential decay of the fermentables in the bucket.
Doing such a plot is a great indicator of when your fermentation is complete -- especially useful if you want to change, say, the fermentation temperature based on how far the fermentation has progressed. (This was the case in this stout, although I think I changed the temperature too late, way into the secondary fermentation ...)
Just wanted to share it!
By the way: the drop around 140 h is due to my wife opening the window, just as I were measuring, letting ice cold air in. The CO2 contracted and saved a bubble for later.
Doing such a plot is a great indicator of when your fermentation is complete -- especially useful if you want to change, say, the fermentation temperature based on how far the fermentation has progressed. (This was the case in this stout, although I think I changed the temperature too late, way into the secondary fermentation ...)
Just wanted to share it!
By the way: the drop around 140 h is due to my wife opening the window, just as I were measuring, letting ice cold air in. The CO2 contracted and saved a bubble for later.
