Peanut color sorters are designed to handle different peanut varieties, including red-skinned or pink-skinned in-shell peanuts (such as Spanish or Valencia types), blanched peanuts, and roasted peanuts. These machines effectively remove defective products based on color variations, eliminating discolored peanuts, shells, split peanuts, oversized/undersized peanuts, and misshapen specimens, along with foreign materials like twigs and stones.

The technological foundation of modern peanut color sorters includes high-resolution CCD image sensors capable of scanning each peanut with precision. These systems utilize professional image acquisition processing to analyze spectral parameters and graphic characteristics at high speeds, enabling them to distinguish between acceptable color variations and true defects. This advanced detection capability ensures that even subtly defective peanuts are identified and removed from the production line.

Peanut color sorting machines are available in different configurations, primarily chute-type and belt-type systems. Chute-type sorters are particularly effective for flat and flaky materials, while belt-type systems offer advantages for smaller or more delicate products. Many modern peanut color sorters also incorporate shape recognition technology (such as PROfile software) that can detect and remove defects based on physical characteristics beyond just color. This multi-dimensional approach to quality control significantly enhances the sorting precision for peanuts.