This instrument is designed to measure the whiteness of rice. Rice whiteness directly correlates with the amount of milling. Therefore, you can use this device to indirectly measure the milling percentage of a rice sample (glutinous and non-glutinous). To make a test, simply insert sample case containing rice. Both the number of measurements and the whiteness value will be immediately displayed. The vacuume fluorescent display has excellent visibility, making it easy for anyone to see the measurement. By using the supplied sample cup and "fixed quantity" shooter, a constant sample a mount is tested, substantially reducing measurement variation.