438505-nansen-closing-net

Nansen Closing Net

Free!

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 100 µm (upper conical part) and gaze of 55 µm (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.

Product Description

Spare Parts & Accessories

Spare Net Part

Free!

Spare netbag for Nansen Closing Net
made of  Tetex, 100µm and 55µm gaze

Category:

Messenger-Operated Closing Mechanism

Free!

including messenger 800 g and closing rope

Category:


Messenger

Free!

for ropes up to 10mm. Weight: 800g

Category:

Spare Vertical Net Bucket

Free!

complete with net bucket frame

Clear
Category:

Mechanical Flow Meter

Free!

with back-run stop for counting the amount
of water passing through the net

Category:
TECHNICAL DATA
MaterialNet ring and net bucket frame: Stainless steel
Closing mechanism: Powder-coated and nickel-plated brass
Net bag: MOnyl
Net bucket: PVC
Dimensions70 cm x 350 cm (dia. x l)
Weight30 kg
Mouth opening70 cm dia./0.3848 m²
Mesh size100/55 µm
ORDERING INFORMATION
Products
438 5051. 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 µm
c Net part, conical, length 1 m, 55 µm

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 115Mechanical Flow Meter with back-run stop for counting
the amount of water passing through the net
Spare Parts
438 507Spare Net Part, 100 / 55 µm
438 520Messenger-operated closing mechanism,
including messenger 800 g and closing rope
440 003Messenger for ropes up to 10mm, 800g
438 975Spare Vertical Net Bucket, complete with net bucket frame