Cigar humidity meter.
https://diqn32j8nouaz.cloudfront.net...r_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...823#post206550
https://www.homemadetools.net/forum/...507#post173836
https://www.homemadetools.net/forum/...449#post158507
https://www.homemadetools.net/forum/...177#post176596
https://www.homemadetools.net/forum/...621#post205723
