Nansen Closing Net
Oceanographic closing net for vertical operations
ABOUT
The Nansen Closing Net is a vertical plankton net with messenger operated closing mechanism. A 70 cm diameter stainless steel ring with a 3 meter long net bag, made of Tetex (zylindrical part), gaze of 100µm (upper conical part) and gaze of 55µm (lower conical part and side window of Netbucket), is operated in conjunction with a heavy net bucket frame for high towing rope speed during descent. For easy retrieval the sample is concentrated inside a removable plastic net bucket with side window (covered with sieve gauze). The open net is brought to the greatest scheduled depth. During ascent the net can be closed in the intended depth by strangulating the net bag below the net ring. This allows for sampling defined depth layers. The Nansen Closing Net can be used in conjunction with one Mechanical Flow Meter with back-run stop for measurements of filtered water volume.
Hydro-Bios No. 438 505 | Vertical Oceanographic Plankton Nets
Spare Net Part
Spare netbag for Nansen Closing Net
made of Tetex, 100µm and 55µm gaze
made of Tetex, 100µm and 55µm gaze
Hydro-Bios No. 438 507 | Spareparts-MPN
Messenger-operated closing mechanism
including messenger 800 g and closing rope
Hydro-Bios No. 438 520
Messenger
with 10mm bore, 800g
Hydro-Bios No. 440 003
Spare Vertical Net Bucket
complete with net bucket frame
Hydro-Bios No. 438 975
TECHNICAL DATA | |
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Material | Net ring and net bucket frame: Stainless steel Closing mechanism: Powder-coated and nickel-plated brass Net bag: MOnyl (PA) Net bucket: PVC |
Dimensions | 70 cm x 350 cm (dia. x l) |
Weight | 30 kg |
Mouth opening | 70 cm dia./0.3848 m² |
Mesh size | 100/55 microns |
ORDERING INFORMATION | |
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Products | |
438 505 | 1. Messenger-operated closing mechanism, including messenger 800 g and closing rope 2. Bridle of Nylon rope with thimble and shackle 3. Net ring of stainless steel with loops for bridle and bucket ropes, with Nylon webbing and zip fastener. 4. Net Part, consisting of: a) Canvas part, cylindrical, with zip fastener and loops for the closing rope, length 100 cm b) Net part, conical, length 1 m, 100 microns c Net part, conical, length 1 m, 55 microns 5. Vertical Net Bucket consisting of: a) Fixing Ring with over centre fasteners b PVC Net Bucket with side windows covered with sieve gauze c) Net Bucket Frame for vertical operation |
Accessories | |
438 115 | Mechanical Flow Meter with back-run stop for counting the amount of water passing through the net |
Spare Parts | |
438 507 | Spare Net Part, 100 / 55 microns |
438 520 | Messenger-operated closing mechanism, including messenger 800 g and closing rope |
440 003 | Messenger, with 10mm bore, 800g |
438 975 | Spare Vertical Net Bucket, complete with net bucket frame |
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