Hygrometer - https://amzn.eu/d/7dQ1rtI
Most of the Amazon ones are the same, as long as dimension are 48mm x 28,6mm
magnet - https://amzn.eu/d/9P4M1Uj
3 x Magnet Size Dia. 6mm x Height 3mm
Hygrometer to be close to my plexiglass door
Thank you ;-)