These have to be the least accurate things I have ever seen.
The rectangular one is accurate or accurate enough and has been what I used but I noticed files all had cutouts for these round hygrometers…
Well from my 6 pack 1 is within a margin of error to even be useful.
I get they aren’t expensive but seems like a waste of money for this bad.
I used 10 rectangular one for my dry boxes because they are cheap and its a rectangular one that was supplied with the Prusa enclosure.
It’s good to know that they seem to be more accurate than the round one.