How Water Activity Meters Work – Principles Behind aw Measurement for Coffee and Food

Accurately measuring water activity (aw) is essential for quality control, safe storage, and precise roasting of green coffee beans. Understanding the scientific principles behind aw measurement—and selecting the right method and equipment—is critical to ensuring reliable data. This article explores the core mechanisms of water activity meters, compares mainstream technologies, and highlights differences in precision among various approaches.  

Agtron Colorimeter vs. Traditional Visual Assessment: Which Is the Ultimate Judge of Coffee Roast Color?

The Science Behind Agtron Roast Analyzer and Coffee Roasting Control