The Sylvite SGN Scale is an instrument designed for simple screen tests of fertilizer samples. It is a small plexiglass box fitted with five seives. It directly produces a size histogram of the sample tested, from which the Size Guide Number (SGN) can be estimated.
Particle size is the most impotant factor in the selection of non-segregating materials. Particle size is commonly identified by SGN, the median dimension in millimeters times 100. For example, if the screen test indicated thata sieve of 2.40 mm opening would retain exactly one half of the sample, the average particle size would be 2.40 mm, or SGN 240.
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Please state the quantity of each type of SGN Scale that you require in the message section of the form. For complete instructions on how to use the SGN scales click here
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