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2020-11-16 at 10:45 AM #14824
Could it possibly be a problem with the temperature inside your logger box rather than the water temperature? Maybe Shannon can pipe in and confirm, but I remember that we used to have issues like this when we were using black boxes with clear lids facing summer sun. I think the Mayfly’s ADC starts acting up when it gets too hot. Are you recording the Mayfly’s DS3231 temperature? It might show something.
I haven’t found a way to re-temperature-correct a depth sensor that’s built-in temperature correction has gone awry.