Grain Sorting


In the past, farmers have to harvest grain by hand. But as technology evolves, grains are now shelled, flaked, cracked, separated, cleaned, puffed, popped and sorted by modern processing machines.

SKY GM Series Color Sorter are designed to efficiently and cost- effectively provides superior quality and appearance on all grain types (such as corns, wheat, millet, maize, sorghum, peanut, oat, quinoa, buckwheat etc.). It is easy to switch between modes to sort different grain types with an accuracy of 99.99 percent.

Impressive Sorting Applications


Wheat Accepted

Sunflower Seeds Accepted

Quinoa Accepted

Peanut Accepted

Wheat Rejected

Sunflower Seeds Rejected

Quinoa Rejected

Peanut Rejected

Why choose sky color sorters


99.99% Sorting Accuracy

SKY GM Series RGB Grain Color Sorter has sorting accuracy of more than 99.99% and a carryover rate lower than 15:1. It’s the modern and efficient way to separate grains

Consistent Results

Consistent performance and a reliable operation with automatic calibration and wiping, maintaining a clean optical viewing area.

Full-Scale Technical Support

A dedicated crew will arrive your processing plant to make sure of the set-up and calibration. SKY provides extra easily-worn parts with each machine and free on-site repair services within warranty period.

Advanced Operate System

With our advanced One-Key Intelligent Operation System, the operation is straight-forward. You’re done at one touch on the NEC screen.

Competitive Prices

Based in China, we can reduce labor cost without sacrificing the stability and accuracy of SKY color sorters.


Within the one-year warranty period, if quality issues occur, spare parts for replacement to be delivered within 24H. Professional on-site repair is free.

GM Series Color Sorter

GM Series RGB Color Sorter adopts the latest one key intelligent operation system; Operators are available to set the area of the material color, shape, size and defect by themselves and confirm the rejected material. Thus machine can automatically set the sorting solution of the material according to the independent calculating, intelligent recognition and intelligent sorting principles with one key intelligent control technology.

GM Series RGB Color Sorter machine can be wildly used to sort kinds of beans and grains

WS Series Wind Sorter

Wind sorter is one kind of gravity separator, which is an important part of seed cleaning line. SKY WS series wind sorter machine is specially designed to separate raw items into heavy, medium, light and dusty with a completely uniform air flow. With machine body be made of SS 304, It is wildly used in precise sorting need of kinds of seeds and grains, which  increase the germination rate by 15-20%.

How does it work?


The grain goes from the hopper into the machine through the vibratory feeder and be scanned by CCD sensor. The system then generates and analyzes the images then instructs the air system to react to rejected grain. At last, accepted grain falls into the finished slot while the defective ones fall into the defective slot and go through the sorting process again to reduce carryover rate.

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color sorter working principle