sampling of the nearshore zone in water depths up to 10 m but can also be
utilized in other shallow water environments. The sample length on the
prototype is 0.5 m.
DESCRIPTION OF COMPONENTS:
Pneumatic Ram
1.
The cores are individually emplaced and extracted by a 12.7 cm (5-in.)
bore pneumatic ram yielding up to 4000 lbs of force at 150 psi (Fig. 2). A
scuba bottle serves as the air source for powering the ram. The ram is fitted
with a 5.1 cm (2-in.) steel shaft and has a 76.2 cm (30-in.) stroke length. A
steel coupling fitted on the end of the shaft serves as the connection between
the ram and the sample tubes (Fig. 2). Because of the weight and the extreme
force exerted by the ram, a 15.2 cm (6-in.) steel I-beam is used to support
the ram.
2.
Indexing Table
A pneumatic indexing table is used to rotate and lock the cassette into
position as each sample is taken (Fig. 3). The table is pre-set for 18
Figure 3. Pneumatic
Figure 2.
Illustration of sampler components and a close up of the
connection between the ram and the sample tube.
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