The file 'Magnetic Holder For Clas Ohlson/Cotech Thermo-/hygrometer 3D Printer Model' is (3mf,stl) file type, size is 2.3MB.
I have found this to be more accurate than the round or rectangle hygrometers you can get from Amazon. After a while I got tired of having to constantly search the bottom of my drybox for it and designed a proper holder based on a good silica box I found, which would suit this purpose with fairly minor modifications. The four 10x2,5mm magnets need to be glued in place, make sure to align them correctly before that.
Hygrometerholder_10x25_magnets.3mf | 1.7MB | |
Hygrometerholder_10x25_magnets.stl | 2.2MB |