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.
Lucky. Pretty sure these are the same from the same internet source but the swing on them is insane. They all showed as 75% in the bags but spending some time with them I realized the complete lack of accuracy when I realized my humidity wasn’t what it was reading.
I have since taken some apart and cleaned them out but now those are just under the humidity by the same percent they were over before.
The analogue one I own (round body) can be tuned/adjusted by a small screw on the back. Maybe that’s an option?