438700-ring-trawl-hydro-bios

Ring Trawl (CalCOFI) Net

Free!

Oceanographic net for horizontal or oblique tows in CalCOFI design

 

About

Based on the design of California Cooperative Oceanic Fisheries Investigations (CalCOFI), the Ring Trawl Net today is the standard non-opening/non-closing plankton net for quantitative sampling of larger volumes of water during horizontal or oblique tows. The 100 cm diameter stainless steel ring, equipped with a 4 meter long net bag should be operated in conjunction with a 22 kg V-Fin depressor to create negative lift at the instrument.

For easy retrieval the sample is concentrated inside a removable plastic net bucket with side window (covered with sieve gauze). A Mechanical Flow Meter can be fixed in the net to measure the filtered water volume.

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Product Description

Spare Parts & Accessories

Spare Net Part

Free!

Spare Net Part for Ring Trawl (CalCOFI)
Net, choose mesh size

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Category:

Spare Plastic Net Bucket

Free!

Spare Plastic Net Bucket, consisting of:
a) Fixing Ring with over centre fasteners
for attaching to the end of a net
b) PVC-Net Bucket with side window,
covered with sieve gauze

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Category:

V-Fin Depressor

Free!

with steel rope and shackle, weight 22 kg

-> V-Fin Article page

Mechanical Flow Meter

Free!

Mechanical Flow Meter

Category:


Net Part for Ring Trawl

Free!

Net Part for Ring Trawl (CalCOFI) Net with
bolt rope for Soft Net Bucket

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Category:

Mounting Ring

Free!

For Soft Net Bucket



Soft Net Bucket

Free!

With bolt rope.

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TECHNICAL DATA
MaterialNet ring: Stainless steel
Net bag: MOnyl
Net bucket: PVC
Dimensions100 cm x 400 cm (dia. x l)
Weight19 kg
Mouth opening100 cm dia. / 0.7854 m²
Mesh size500 µm (or as per choice between 100 and 1000 µm)
ORDERING INFORMATION
Products
438 700Ring Trawl (CalCOFI) - Net
1. Bridle with thimble and shackles
2. Net ring of stainless steel, with Nylon
webbing and zip fastener
3. Net Part consisting of:
a) Net Part with zip fastener, cylindrical,
diameter 1m, length 1 m, 500 µm
(or as per choice between 100 and 1000 µm)
b) Net Part, conical, upper diameter 1 m,
lower diameter 11 cm, length 3 m, 500 µm
(or as per choice between 100 and 1000 µm)
4. Plastic Net Bucket, consisting of:
a) Fixing Ring with over centre fasteners for
attaching to the end of a net
b) PVC-Net Bucket with side window,
covered with sieve gauze
Accessories
438 416V-Fin Depressor with steel rope
and shackle, weight 22 kg
438 110Mechanical Flow Meter for counting the
amount of water passing through the net
438 703Net Part for Ring Trawl (CalCOFI) Net with
bolt rope for Soft Net Bucket
438 935Mounting ring for Soft Net Bucket
438 930Soft Net Bucket with bolt rope
Spare Parts
438 702Spare Net Part for Ring Trawl (CalCOFI) Net,
500 µm (or as per choice between 100 and 1000 µm)
438 955Spare Plastic Net Bucket, consisting of:
a) Fixing Ring with over centre fasteners
for attaching to the end of a net
b) PVC-Net Bucket with side window,
covered with sieve gauze