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Ok! I stuck my two cheapos in a double zip lock with one half cup of moist salt. It didn't say a thing about not doing this test in the manual. These two gems usually read all sorts of different. Inside/outside temps different and RH on each different. Sometimes drastically... But, now...

Ok! Who has a calibrated wet bulb thermometer I can borrow?

Quote: OK, I'm gonna ask... If it says you should not do the salt test, how do you know it's accurate or why do you believe it's accurate.

I've only ever used the salt test and wrapping in a damp rag. Be careful it's not too damp. You may damage your meter. With the salt test your meter should read 75% after about 8 hours. I double bag the salt and meter together. With the rag you should read >95% almost immediately. Does...

Thanks for the replies! You've tested? Using the salt test?

Alright! I'm tired of reading about humidity. Does anyone have a hygrometer that they really really trust for accuracy? If so, which one. And where did you get it? Thank! (fellow bator gazers!)