Why measure TDS

TDS (Total Dissolved Solids) tells you how strong your coffee is, meaning what percentage of the drink is dissolved coffee solids. Combined with your dose and beverage weight, it lets you calculate extraction yield and see whether a coffee is under- or over-extracted.

With the R2 Extract you don't rely on taste alone: you dial in grind, ratio and time with objective data and repeat the same result every day.

Key features

How to use

1. Zero the device with distilled water.
2. Take a sample of your coffee with the included spoon and let it cool to room temperature.
3. Place the sample in the dish and start the test: TDS appears in 4 seconds.
4. Log the result in the app and adjust your recipe accordingly.
5. Rinse the dish with water and wipe it dry.

Who it's for

• Baristas and cafes who want consistent quality in every cup and every shift.
• Roasters evaluating roast profiles and developing recipes for their customers.
• Home baristas who want to understand and improve their coffee with data.

Pair it with a precision scale to calculate the extraction yield of every brew and lock in the recipe you love.