The US SAH-97 is a handheld device used to grade or measure
gravel and small cobble size bed sediments in the field.
Generic names are gravelometers, gravel templates and
The unit is constructed from 1/8" thick aluminum. The US
SAH-97 has 14 square holes of common sieve sizes (1/2-phi unit
classes) ranging from 2 mm to 180 mm. There is also a scale
along one side that can be used to measure up to 310 mm. The
scale is in 10 mm increments.
SAH-97 Handheld Size Analyzer 0.6 lb.