R2 Extract - Coffee TDS Refractometer
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R2 Extract – Coffee TDS Refractometer
The R2 Extract Coffee TDS Refractometer is a precision tool designed for baristas, roasters, and coffee professionals who want to measure extraction and brew strength with accuracy. By analyzing the Total Dissolved Solids (TDS) in your coffee, this device helps you understand extraction levels and fine-tune your brewing process for consistent, high-quality results.
Whether you're dialing in espresso, optimizing pour-over recipes, or maintaining quality control in a café or roastery, the R2 Extract provides fast and reliable measurements to support data-driven brewing.
Key Features
Accurate TDS Measurement
Quickly measures the Total Dissolved Solids (TDS) in coffee, helping you evaluate brew strength and extraction yield.
Improved Brewing Consistency
Allows baristas to precisely dial in recipes and maintain consistent flavor profiles across different brews.
Fast and Easy to Use
Simply place a small coffee sample on the sensor and receive readings within seconds.
Compact & Portable
Lightweight and easy to carry, making it ideal for cafés, roasteries, training labs, and coffee competitions.
Quality Control Tool
Perfect for professional environments where maintaining brew consistency and extraction accuracy is essential.
Ideal For
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Specialty coffee cafés
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Coffee roasters
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Barista training and education
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Brewing experimentation and recipe development
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Coffee competitions and quality control
Why Use a Coffee Refractometer?
Using a refractometer helps measure coffee strength (TDS) and calculate extraction yield, allowing baristas to brew within the optimal extraction range for balanced flavor, sweetness, and clarity.
Specifications
TDS Measurement Range: 0 – 30% TDS
Accuracy: ±0.03% TDS
Precision: ±0.02% TDS
Resolution: 0.01% TDS
Refractive Index Range: 1.33299 – 1.38660
Refractive Index Precision: ±0.00004
Refractive Index Resolution: 0.00002
Test Time: ~4 seconds
Operating Temperature: 5°C – 40°C
Battery Capacity: 430 mAh rechargeable lithium battery
Charging Port: USB-C
Charging Specification: 5V ⎓ 0.3A
Water Resistance: IP67 (rinseable for easy cleaning)
Physical Specifications
Dimensions: 88 × 36 × 16 mm
Weight: ~36 g
In the Box
R2 Extract Coffee Refractometer
Coffee sample spoon
Protective travel case / pouch
USB-C charging cable
User manual
DiFluid is a technology company specializing in precision measurement tools for coffee and liquid analysis. Founded in Shenzhen, China by Linus Peng, the company focuses on digitizing liquid analysis and bringing laboratory-grade tools to the specialty coffee industry.
DiFluid develops innovative brewing tools such as refractometers, precision coffee scales, and mobile apps that help baristas and roasters measure TDS (Total Dissolved Solids) and extraction yield with high accuracy. Their products are designed to improve brewing consistency, workflow, and data-driven coffee preparation for professionals and enthusiasts.
