Mark 78H-21
PARFLUX Sediment Trap
The PARFLUX Mark 78H-21 is a time-series sediment trap designed to
collect settling particles in oceans and lakes. The sediment
trap can be deployed for a short time period -- days to weeks --,
or continuously for up to 18 months. Sample capacity of the Mark
78H-21 is 21 events.
For minimum sample contamination, the interior layer of the cone
and the sample bottles are made from natural polyethylene. Each
sample bottle is securely sealed from ambient water before and
after each collection period. The Mark 78H-21 frame is a rugged,
non-contaminating, long lasting titanium weldment. A trap can
be easily handled by two people and is designed to withstand deployment
in high seas. It can be deployed with a stand-alone mooring or
as a large high-tension array to depths of 10,000 meters. Optional
sensors such as compass/tilt, pressure, and
temperature are also available.
The menu-driven, user friendly operating software is designed
for maximum programming flexibility via serial communications (RS-232
port). The sediment trap controller saves self diagnostic data
before and after each event.
Three years parts and labor warranty
Specifications
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Dimensions |
Height |
164 cm |
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Diameter |
91 cm |
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Approx. vertical surface area |
0.66 m² |
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Weight |
(no bridles) In air with empty bottles |
70 kg |
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In air with full bottles (water) |
75 kg |
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In water |
35 kg |
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Aperture/Funnel |
Aperture area |
0.5 m² |
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Aperture diameter |
80 cm |
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Baffle material |
Polycarbonate, 1.0 mm wall thickness |
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Approx. number of baffle cells |
368 |
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Baffle cell diameter |
2.5 cm |
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Aspect ratio of a cell (h/d) |
2.5 |
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Included cone angle |
41° |
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Bottom diameter (ID) |
2.80 cm |
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Internal coating (liner) |
Natural polyethylene |
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Rotary Assembly |
Number of sample bottles |
21 |
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Standard container volume |
500 or 250 ml |
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Rotary disk diameter |
50 cm |
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Drive motor |
Stepping motor |
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Drive train |
Direct gear train |
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Drive torque at the 2nd spur |
30 kg/cm |
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Time to shift a bottle |
25 seconds |
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Controller |
Housing material |
6AL/4V Titanium |
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Primary battery |
14 each 'C' size alkaline |
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Back-up battery |
9 VDC alkaline |
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Communications |
RS-232 |
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Optional |
compass/tilt sensor ± 20° |
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Frame |
Material |
Titanium unalloy, Ti-45A/G-2 |
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Structure |
Weldment |
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Bridle configuration |
3 and 3 in line, 1.29 cm insulated eye |
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Operation Condition |
Minimum deployment period |
One minute per bottle |
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Maximum continuous deployment |
18 months |
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Depth |
10,000 m (Titanium pressure case) |
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Operating temperature |
-2° to +50°C (electronics tested to -10°C) |
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