The Hess Sampler was designed for effective
sampling of streams with gravel and small cobble
bottoms. It has the same basic function as the
Surber but is designed to prevent escape of
organisms and contamination from drift. It consists
of a stainless steel 13" (330 mm) by 16" high
cylinder with two upstream and two downstream Nitex
windows and two strong handles for pushing the
cylinder into the stream bottom. Penetration depths
of 3" or 6" can be achieved by attaching the handles
to either end of the sampler. Water flows through
the upstream opening of the sampler and out through
the downstream windows and into the collection net
and bucket. The downstream net is constructed of
Nitex nylon in a choice of mesh sizes.
604-013 1000 µm mesh size 17 lbs.
604-014 600 µm mesh size 17 lbs.
604-015 500 µm mesh size 17 lbs.
604-016 363 µm mesh size 17 lbs.
