CoffeeOS compatible

The Particle Size Coaster is a visual grind-size reference tool for coffee. By comparing your grounds to calibrated patterns on the coaster, you can dial in grinders faster, teach consistent grind standards to your team, and reduce guesswork when developing recipes. It pairs well with measurement tools like TDS meters, Brix Sweetness Refractometers, and precision scales to build a more controlled and repeatable coffee brewing workflow.