I use a probed thermometers in the rack too. Personally I find the accurites too large, bulky, and inaccurate. I don't use them. I just use (checked) probed aquarium types, the unit held on the out side of the tub with a magnet and the probe suction cup held where I want it.

The top slot has two hot and cool. The middle hot only and the bottom hot and cool. I have found the others will be between the top and bottom so I know the range. Once a week I gun every one. I have stable rh ( humidify the room) so I just check the room rh wise.


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