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SGN Scales

Identify your fertilizer blend’s Size Guide Number with a Sylvite SGN Scale.

Why It’s Important

The Sylvite SGN Scale is an instrument designed for simple screen tests of fertilizer samples. It is a small Plexiglas box fitted with five sieves. 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 important 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 that a 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.

Scale Model Screens Dimensions Cost
Agriculture 60-R5 100 x 400 CBG SGN 100, 140, 200, 280, 400 14 cm x 9.5 cm x 5 cm $190.00 CAD
Fairways 60-R5 140 x 280 CBG SGN 140, 170, 200, 240, 280 14 cm x 9.5 cm x 5 cm $190.00 CAD
Greens 60-R5 70 x 140 CBG SGN 70, 85, 100, 120, 140 14 cm x 9.5 cm x 5 cm $190.00 CAD
Specialty 225-R6 70 x 280 CBG SGN 70, 100, 140, 200, 400 24.8 cm x 16.5 cm x 6.3 cm $290.00 CAD


Using the form below, select the scale or scales you wish to purchase, enter your contact information, and click “Submit Order.” Once complete, a Sylvite representative will contact you to finalize details and collect payment.

Order Your SGN Scale
Please select the SGN Scales you wish to purchase.