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.