The Ekman Dredge is great for collecting sludge and sediment samples. Nominal bucket dimensions are 6" wide X 6" height X 6" deep with an approximate sampling footprint of 36 square inches. With it...
Bottom Dredges are primarily used to sample sand and silt but can be used to sample most types of non-cohesive material, except hard-packed clay. Nominal bucket dimensions are 8.75" wide X 4.5"...