Extract Everything 006: Coffee Refractometer Basics | Measuring TDS + Extraction Percentage

What exactly does a coffee refractometer do, and what are TDS and extraction percentage? Now you know. Vlog Playlist: http://bit.ly/2d5kVNz Music by Joakim Karud   / joakimkarud   My Equipment: Vlogging camera I use: http://amzn.to/2rDIB3J Lapel mic I use for Extract Everything series: http://amzn.to/2rDS231 Memory cards I use: http://amzn.to/2rLU0Ax Big old camera: http://amzn.to/2rDFYim Awesome cheap 50mm / f1.4 lens for big old camera: http://amzn.to/2swyXja Awesome even cheaper 24mm / f2.8 lens for big camera: http://amzn.to/2s9tVMw