Here's a question I've been dieing to ask, but been afraid to, so here goes:
Let's say I have three different digital hygrometers; one from Radio Shack, on Don Savatore, and one generic. If I lay all three side by side, anywhere in my house lets say, and all three read the exact same RH, is it fair to say that they are accurate? My logic being: what are the chances that three hygrometers, from three separate vendors could be EXACTLY the same percentage off?
If I salt-test these, and they are all exactly equally off, would it not be more likely that the salt test is wrong? Or that I'm doing the salt test wrong?