The CM-200 portable Coffee Roast Degree/Uniformity/ Ground-Size Analyzer is designed to measure the roast degree, roast uniformity for both whole bean and ground bean, and it can also analyze the distribution of ground size. It is a useful portable tool with its user-friendly interface, accurate performance and reliable quality. It provides you accurate SCAA Gourmet numeric scales result and display a variety of name terminology corresponding to the result (Light, City, Italian, etc). Besides roast degree, it also provides the color uniformity of how your coffee beans were roasted, and if you would like to check how your grinder performs, the CM-200 can analyze the distribution of ground size, this would make your grinder calibration much easier It's Highly recommended to have a CM-200 to coffee roasting vendors, coffee shop owners or home roasters.