Field olfactometer used to detect and measure odor strength in the air.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...r_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net...factometer.jpg
Previously:
https://www.homemadetools.net/forum/...894#post160120
https://www.homemadetools.net/forum/...614#post159165
https://www.homemadetools.net/forum/...743#post159676
https://www.homemadetools.net/forum/...433#post158454
