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90 mm tripod gravity corer You can vary how far the corer penetrates into the sediment by mounting the additional weights. Attached to the tripod is a ball clamp which allows the corer tube to move downwards when the tripod has set on the bottom, but closes when the corer is lifted. The sample is not only pushed into the tube, but also pulled by a piston placed on the top of the tube. This allows meter-long samples to be drawn, with very high reliability giving excellent return on every sample session. When the corer is lifted, the tube is then removed from the corer and placed with the piston on the extruder rod. By releasing the lock you can easily evacuate superfluous water at the top and manually move the core tube downwards until the sediment-water interface is a few centimeters below the top of the tube. Then the lock is fixed and you can attach the the scraper platform on the top of tube. Samples are pressed out by turning the extruder's bottom, one turn 360 =5 mm. Take a look at the leaflet here.
Pylonex Termokonsult HB, PO Box 3069, 903 03 Umeå, Sweden. Org number 969718-9935
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