I bought two of these by accident. Let me know if anyone is currently in need.
That's very cool of you. I've just done the salt test never tried these myself.
If you're offering one, I'd put my hand up for it - I'd include it in an auction package for a nonprofit that I'm putting together. Don't put me in front of any BOTLs who would make use of it, though!
Shipping out to jharrisx5. Hope it works well for your new hygrometers!