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.
yeah, it’s usually 60% ambient humidity here, and then in the dry box it’ll read <15%. so that’s a pretty decent indicator to me that it’s working fine. I don’t really care if it’s 10, 15, or even your 25%, those are all way less than the ambient baseline and let me know that the dessicant is working.
If you’ve got some need to the humidity accuracy then that’s another thing, but for me that’s why I use those cheapos.
I use modified cereal containers with dessicant on the bottom and have a mount modelled up for those sensors.