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I use a combination of averaging, stirring and recirculating. My mashtun has a large open area under the false bottom. I drain some hot wort off the bottom and add it to the top of the grain bed - - -> then stir- - - > then average. If you don't have a drain valve, you could raise and lower the grain basket a bit to even out the temperature, then ...


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Measure in 2 or 3 places, then take the average. Works well for me.


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