Why measure your grind

Particle size and uniformity are among the biggest factors in extraction. Two grinders on the 'same' setting can give very different results, and the same grinder changes as its burrs wear.

The Particle Analysis Coaster gives you objective data without expensive laser equipment: the printed surface with a fixed diameter acts as a scale reference for your phone camera, so the app can correctly size every particle.

Key features

How to use

1. Open the Particle Analyzer tool in the CoffeeOS app.
2. Sprinkle a small amount of ground coffee evenly in the centre of the coaster, with particles not touching.
3. Photograph the coaster from above so the whole reference frame is visible.
4. Read the distribution and save the result with your grinder setting.

Who it's for

• Home baristas who want to understand and dial in their grinder.
• Cafes checking grind consistency across grinders and shifts.
• Roasters and trainers developing recipes with comparable data.

Pair it with the DiFluid R2 Extract for TDS and the Microbalance scale for complete control of your recipe.