Beer foam stability testing machine. A specialized machine for measuring beer foam stability and decay.
https://diqn32j8nouaz.cloudfront.net...ity_tester.jpg
The science behind:
https://www.craftbeer.com/craft-beer...hind-beer-foam
Previously:
https://www.homemadetools.net/forum/...617#post123373
https://www.homemadetools.net/forum/...3095#post98045
https://www.homemadetools.net/forum/...286#post101209
https://www.homemadetools.net/forum/...5062#post81114
