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Central Minnesota | The Optek control is a true moisture reader. We installed it I think after the second year of trying to dry with heat sensors. Their is 4 moisture sensing plates that go over the dump chutes. You set the dump spout times and the target moisture. Then the control will gradually change the dump times per hour to maintain the target moisture. While not perfect because like you said there is some time involved from when the corn enters and is finally cooled it is way better then heat sensing control. If the corn is a reasonably consistent moisture entering the dryer with some experience over the years it does a pretty good job. It is to bad they don't make this controller any more for top dryers. They are still in business and I sent my controller into them an they updated a few things but told me they don't make them any more. I see Optek makes controllers for seed corn but don't see any for the top dry.
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