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Tamiz Geológico de 22 x 28"Telémetro Bushnell 1200 ARC

Tamiz Gravelómetro
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Tamiz Gravelómetro

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Al-Sci Field Sieve/Gravelometer    
The accurate and fast way to collect data on stream bottom materials!
Makes pebble size determination faster and more consistent than using a ruler when using the Wolman pebble count procedure for stream classification.
The square openings measure particle sizes ranging from 4 mm to 128 mm while notches on the top edge measure 180, 256 and 362 mm.
Bottom notches located at 100, 200 and 300 mm provide additional measurements.
Made from 2 mm anodized aluminum, the lightweight, durable sieve measures 8-1/2” x 15”.
Easily used by one person, the surface can be written on with pencil and later erased.