DiFluid R2 Extract coffee TDS refractometer, front view showing a 1.42% TDS reading
DiFluid R2 Extract refractometer at an angle with TDS, refractive index and temperature on screen
DiFluid R2 Extract refractometer angled view showing the aluminum sample dish and display
Back of the DiFluid R2 Extract refractometer
Side profile of the DiFluid R2 Extract, 16 mm thick
DiFluid R2 Extract refractometer charging over USB-C
Adding a coffee sample to the DiFluid R2 Extract sample dish
DiFluid R2 Extract testing a coffee sample on a wooden tray
DiFluid R2 Extract next to a phone running the DiFluid Café app brew control chart
DiFluid R2 Extract coffee TDS refractometer, front view showing a 1.42% TDS reading
DiFluid R2 Extract refractometer at an angle with TDS, refractive index and temperature on screen
DiFluid R2 Extract refractometer angled view showing the aluminum sample dish and display
Back of the DiFluid R2 Extract refractometer
Side profile of the DiFluid R2 Extract, 16 mm thick
DiFluid R2 Extract refractometer charging over USB-C
Adding a coffee sample to the DiFluid R2 Extract sample dish
DiFluid R2 Extract testing a coffee sample on a wooden tray
DiFluid R2 Extract next to a phone running the DiFluid Café app brew control chart

DiFluid

DiFluid R2 Extract

DiFluid R2 Extract

$230
$230

The DiFluid R2 Extract is a pocket-sized coffee refractometer that measures the total dissolved solids (TDS) in your brew with ±0.02% precision. Drop a sample in the dish, press the button and you have a reading in about 4 seconds. No more guessing whether a recipe is under or over extracted; now you have the number to prove it.

Pair your TDS reading with your dose and brew weight to calculate extraction yield, log it in the DiFluid Café app and repeat the recipes that taste best. The 0 to 30% TDS range covers everything from pour-over to espresso, the IP67 water-resistant body rinses clean under the tap, and the USB-C rechargeable battery keeps it ready for a full day behind the bar or a morning at home.

Includes Fast and Free Shipping and a 12-month parts warranty.

Usually ships within 4-5 business days
  • ±0.02% TDS precision
  • Results in about 4 seconds
  • IP67 water resistant
  • DiFluid Café app

Finance Details

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DiFluid R2 Extract

Brand: DiFluid

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Flexible Payments Finance up to 5 years
Free Delivery Across contiguous US

The DiFluid R2 Extract is a pocket-sized coffee refractometer that measures TDS with ±0.02% precision in about 4 seconds, so you can dial in pour-over and espresso with real numbers.

  • High-Precision TDS Readings - Measures 0 to 30% TDS with ±0.02% precision, ±0.03% accuracy and 0.01% resolution, so you can spot extraction changes that are hard to pin down by taste alone.
  • Fast, Simple Testing - Zero the device with pure water, add your coffee sample to the dish and press the button. Your reading appears in about 4 seconds.
  • Three Test Modes - Choose Standard, Multi-test or Auto-test mode, depending on whether you want a single reading, repeated readings or hands-free testing.
  • Refractive Index Readout - Displays refractive index alongside TDS and sample temperature, with a range of 1.33299 to 1.38660 and 0.00002 resolution.
  • IP67 Water Resistance - Rinse the sample dish under running water between tests and wipe dry. Test, rinse, repeat.
  • DiFluid Café and CoffeeOS - Log your results and share recipes and data in the app. Pair it with the DiFluid Microbalance to plot brews on the Brew Control Chart.
  • Pocket-Sized and Rechargeable - Measures just 88 x 36 x 16 mm, weighs 36 g and charges over USB-C from a built-in 430 mAh battery in about 2 hours.

  • DiFluid R2 Extract Coffee Refractometer
  • Quick Start Guide
  • 12-Month Parts Warranty
  • Fast and Free shipping within the contiguous US

Shenzhen-based maker of digital coffee measurement tools, founded by a team with backgrounds in chemistry, optics and electronics. DiFluid's range covers the whole chain from green bean to cup: TDS refractometers, brewing scales, roast color and particle size analyzers, moisture and density meters, and roast smoke elimination. Its devices bring lab-grade measurement to cafes, roasters and home baristas at accessible prices, and connect to the DiFluid Café app for logging and sharing data.

The Standard Warranty covers the replacement of defective parts for up to 24 months after the purchase date.