Expanded view of water-column compartment and door closure unit. The top tube section of the sampler must be long enough to facilitate placement of sampler handles and brackets used to lock sampler doors. Sampler handles and the door closure handle brackets are attached with standard hose clamps to the top tube. The water-column compartments and the sediment tube are stacked vertically and coupled together at the corners with 7 mm bolts. Wing nuts are used to facilitate breakdown and assembly of the sampler in the field.
Compartment doors are secured to the closure cable with a loop of small-diameter braided nylon line.
Nylon line is inserted through two holes in the rear of each door housing and then into two holes drilled in the leading edge of the door. A knot in the nylon line prevents the line from pulling out of the doors when they are closed. A snap swivel attaches the loop of nylon line to the closure cable. The closure cable is constructed with 1.5 mm plastic-coated braided wire cable, a 7 mm OD wooden dowel, and a handle of 25 mm OD wooden dowel. The 90 cm wooden dowel is attached to the wire cable to prevent tangling.