After printing both versions of the center case that supported the addition of the hydrometer, I realized that while the second case looked better aesthetically it did not function well due to the lack of airflow around the unit.
Remixed the unit to allow for airflow around it for more accurate readings of the environment, and remixed the lid to correct for the size difference between the middle compartment and the outer ones on the AMS.
I ran both hydrometer version tests (original 1, and this one), and the readings were consistently inline with each other when changing environments.
Print in place with no supports, at normal speed and standard material settings. I did mine in PLA.
NOTE: Added an untested fix to account for the fins that were reportedly added to the front of the newer version of the AMS. Uploaded as a secondary model/stl file.
Original Model:
Hygrometer used:
Amazon.com: 3-Pack Mini Hygrometer Thermometer Meter Digital LCD Monitor Indoor Room Round Humidity Temperature Gauge for Humidors Home Greenhouse Babyroom Reptile Incubator, Monitor : Patio, Lawn & Garden
Looks like original hygrometer is out of stock, but this one should be the same
Amazon.com: JEDEW 2-Pack Mini Hygrometer Thermometer Digital LCD Monitor Indoor/Outdoor Humidity Meter Gauge Temperature for Humidifiers Dehumidifiers Greenhouse Reptile Humidor Fahrenheit(℉)/ Celsius(℃) : Patio, Lawn & Garden