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Our Grader

How it works




Our Grader

The G5s Grader - includes grader, elevator and separator.


The G5s Grader is a magnificent piece of machinery developed over several years in partnership with local South Australian companies to produce a cutting edge product for the oyster industry.


The G5s grader is fast, accurate and easy to use. It is also compact, having a small workspace footprint. The G5s grader has one moving part that distributes the product.

How it works

The oysters travel up an elevator and into a custom made separator that delivers the oysters into the grader in single file.


The G5s grader uses a custom 4-axis imaging system.


There are 4 separate scanners that capture an image of each oyster from 4 different angles as it is falling.


Electronics and software developed by Oystek combines the 4 images to determine the length of each oyster.


The oyster is then directed into one of 8 outputs by a curved chute called the J-Curve, which rotates into the appropriate position for each oyster size.


The sizes for the outputs are setup through the touch-screen PC and saved as a grading scheme.


Schemes can be easily edited and created as required specific to grower needs.


Speed: The G5s Grader can achieve high average grading rates subject to the feed-in system.


Dimensions: Length 3.45m - Width 1.25m - Height 2.55m (grader, elevator and separator).


Power: 200V - 240V single phase AC 50-60Hz (Requires separate dedicated mains supply, alternately a 1KW U.P.S. is recommended).


Materials: Stainless steel frame and high strength ABS plastic housing.


Oystek has also designed a standard range of ancillary equipment including hoppers, washers and inspection conveyors.


These can be built to your specifications if required.

Oystek Grind-Off

The Grind-Off is a hand-held tool that uses a spinning cutter to remove barnacle and over catch from oysters.


It saves time, is quick and easy to use, and reduces the potential of repetitive stress injury.


Powered by a standard 24V, 2Amp power supply (included).


Order yours today!

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