30-day<br>hassle-free returns

30-day
hassle-free returns

Worldwide shipping

Worldwide shipping

Human support<br>Not AI

Human support
Not AI

Award-winning design

Award-winning design

Fast, easy, at home calibration

Fast, easy, at home calibration

30-day hassle-free returns • Worldwide shipping • Human support, not AI • Award-winning design • Fast, easy, at home calibration

R2 Extract - Coffee TDS Refractometer

The Brew Control System includes the essential tool to track, analyze, and perfect your brews: R2 Extract.


  • Measure TDS & Calculate Extraction: R2 Extract provides highly accurate TDS measurements so you can calculate extraction yield and understand how your coffee is developing.
  • Manual Brew Logging: Even if you don’t record your brews automatically, you can manually enter brew parameters into the CoffeeOS Brew Control Chart and match them with extraction data to dial in brews effectively.
  • Consistency Across Brews: Track and compare each brew in CoffeeOS to maintain repeatable results, making this tool ideal for cafés, roasteries, or other coffee businesses seeking quality control.
  • Data-Driven Brewing: Use R2 Extract data in CoffeeOS to fine-tune grind size, ratios, and brew techniques, helping you reach optimal flavor in every cup.
  • Professional-Level Insights: Even without automatic brew recording, you gain full visibility into your extraction trends via CoffeeOS, improving quality and efficiency over time.

Learn more about R2 Extract.


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$229.99