Let me know what yours reads during the salt test. I was getting irritated, so I went to my local B&M and forked out $30 for a Western Caliber III. It says it is calabrated at the factory to +- 1%, and not to do any salt test on it. I have all three sitting in my humi with 70% beads. This is what they read.
Radioshack 73%
Don salvatore 59%
Caliber III 65%
Analog on front of Humi 65%
I don't know where my humididty is.....
I have another desktop humi, and a tuperadore I am trying to regulate, I dont know which one to beleive.
Later,
Brock