Multiplate
Hester-Dendy Sampler
Some substrate samplers sample over time as well
as in a particular space. Where the substrate will
not allow grab samplers or similar devices,
organisms can be lured into samplers designed to
mimic the substrate. The multiple-plate substrate
sampler mimics substrates with narrow, openings,
such as leaves or woody debris. These kinds of
samplers are placed in the substrate for a period of
time and recovered. The number and kind of insects
which have colonized the surfaces are counted. Since
the surface area of the plates or spheres is known,
the multiple-plate samplers are quantitative
samplers.
The Hester-Dendy sampler is available in three
different designs: small, square plates, round
plates, and large, square plates. These are approved
by the USGS, EPA and other groups for benthic macro
invertebrate organism collection found in rivers,
streams, lakes, and tidal flats. Their hardboard
plates are divided by special nylon spacers and when
left in place for about two weeks will attract a
good collection of insect larva and other organisms.
The plates have smooth surfaces on each side, are
fastened together with a long eye bolt, and can
easily be disassembled for specimen examination.
Plates and samplers in all designs are made of
1/8" (3mm) smooth, tempered hardboard. The eyebolt,
washers, and wingnut are made of stainless steel for
long life. Wingnuts at the bottom allow disassembly
without tools.
Large
Square Hester-Dendy
Fourteen 3" (7.5 cm) square plates and 1"
diameter spacers. Total sampling area is 0.16 m2.
604-195 Large,
Square Sampler
1 lb.
Round
Hester-Dendy
Fourteen 3" round disks and 1" diameter spacers.
Total sampling area is 0.16 m2. This style will fit
in a wide mouth mason jar for transport or storage.
604-196
Round Sampler
1 lb.
Small Square Hester-Dendy
Nine 3" square plates and 1" diameter spacers.
Total sampling area is 0.10 m2. This style will fit
in a wide mouth mason jar for transport or storage.
604-197
Small, Square Sampler
0.5 lb.
604-198
Wide Mouth Glass Mason Jar w/Lid, Case of 12
8 lbs.
604-199 -- Wide Mouth Plastic Sample
Container w/Lid, Case of 12 -- 3.2 lbs.
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