I bought a SUNLU Filament dryer to help solve my filament moisture issues ( https://amzn.to/2JTUdNk ).
I designed a mount to use the small rectangular temperature/humidity sensors ( https://amzn.to/372N2eJ ).
It uses the upper filament port to mount. That way no modifications are required to the dryer.
I found it works better if you store silica gel in the hub of the filament reels. The design by Malolo ( https://www.thingiverse.com/thing:3494496 ) does a nice job.
You can fill it with rechargable orange/green silica gel ( https://amzn.to/3ngZs8B )
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