Applying 2048 pixel high-speed line scan CCD camera and photo processing technology can process photo parameters ever faster. Field bus structure making sure high consistency of signal, stability and simpled outline. Capable of detecting minimum area 0.08mm2, and by analyzing finest color difference making perfect sorting possible. Both flat type and channels type are available, making if much easier for changing between cereal and larger article sorting. Specialized high frequency imported solenoid valve, smaller gas use, faster response rate, higher accuracy rate, longer service life, compounded with nimble, highly effective control algorithm, guarantee the outstanding drag-out effectrate and the ectremely high rejection precison.