A simple adapter to use cheap mini hygrometers in filament/dryer boxes.
Hygrometers/Thermometer:
https://de.aliexpress.com/item/32802971272.html
Storage containers 1,6L:
https://www.amazon.de/dp/B0B2J79YQ6
Works in my case for most 800g/1000g filament spools.
The author marked this model as their own original creation.