4-Pack Mini Digital Temperature Humidity Meters Gauge Indoor Thermometer Hygrometer LCD Display Fahrenheit (℉) for Reptile Tank,Jars,Guitar Case,Greenhouse, Garden, Cellar, Fridge, Closet

I went from tuppedor to humidor recently. The gauge on mine was ok, but I have a bunch of amazon hygrometers that I know are good. Maybe get a 4 pack of these little guys 4-Pack Mini Digital Temperature... https://www.amazon.com/dp/B07GNMKYCZ?ref=ppx_pop_mob_ap_shareand put them on various shelves along with one or two 68% Bovedas. This way, you’ll have two known good sources of humidity data. You can then adjust where the packs are to stay in the range you want.

Not OP, but I've done something that I think is quite similar. The model I printed is this one for the humidity holder and desiccant tray in the bottom: https://makerworld.com/en/models/1421626-kichly-desiccant-filament-spool-holder#profileId-1477090 The plastic containers should be something like these, though this is what I ordered: https://www.amazon.com/dp/B08TWH2QHV The humidity meters I ordered were these: https://www.amazon.com/dp/B07GNMKYCZ Some desiccant to put in the bottom: https://www.amazon.com/dp/B07QGX2MFQ