Refractometer is a measurement device that can measure the dissolved solids of brewing water and make it tared as zero point then compare it with the final cup and tells how many percentage of the coffee is extracted. The ideal extraction based on Specialty Coffee Association(SCA).

R2 series is lot more professional than the R1 series and is a real competitor for high end refractometers with much lower price and as precise and/or even more and very fast-responsive.

Incredible Precision - Our most precise refractometer yet, at ±0.02%.

Color Display - Capable of displaying more data for more testing options.

Aluminum Sample Dish - 675% better temperature conductivity for an incredibly stable measurement.

IP67 Water Resistant - Test, rinse, repeat. Just that easy.

Microcalibration - Advanced temperature compensation via special Microcalibration layer.

Range: 0-30%TDS

Resolution: 0.01%

Accuracy: ±0.03%

Battery: 430mAh

Precision: ±0.02%

Operating Temperature: 5-40°c