PLANKTON NETS

WATER SAMPLERS

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PLANKTON SAMPLERS

LABORATORY EQUIPMENT

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Closing Plankton Nets

• Quantitative zooplankton analysis
• Discrete vertical towing applications

Nets Include:

• plankton net:
  • heavy duty Nitex® nylon net available in most mesh sizes (see current price list for available sizes); mouth to length ratios: 1:3, 1:4, 1:5 or 1:6; nets include a brass ring choke band (except Puget Sound Net)
    
    
• stainless steel ring and three point bridle:
  • ring diameters (cm): 15, 20, 30, 50, 75, or 100
  • stainless steel ring with cross-bar and towing eye also available
  • units include 20 m calibrated (1.0m intervals) polypropylene line and reel
    
    
• PVC collecting bucket:
  • COD END ASSEMBLY 2-piece PVC design with detachable lower section with lateral apertures and lined x (specified) micron mesh, CNC made ” threaded coupler” with band clamp zinc ballast weight. Available in various diameters and volumes: 9 cm (500 ml), 11 cm (1000 ml), and 17 cm diameter (4000ml).
• release mechanisms:
  • snap-shackle release:
    • stainless steel construction
    • sharp pull on towline actuates net closure at desired stratum
    • very accurate and reliable closures to 50m
    • not recommended for net diameters over 30cm
  • weight actuated release mechanism: cast bronze and stainless steel construction
    • available in light duty, heavy duty, and double release models, actuated by split messenger(s)
      
      
• split messengers:
  • cast bronze and stainless steel construction
  • easy opening-closing design for attachment to any point on a cable
  • attaches to cables up to 7mm diameter
  • available in: 333gm, 666gm, and 1.0kg sizes
    
    
• Options:
  • custom sizes and modifications
  • mechanical flowmeters (G.O. model R2030)
  • non-metalic rings and bridles

REDUCTION COWLINGS, TAPERED COLLAR. (A.K.A. WISCONSIN COLLARS) USED TO REDUCE VOLUME TO SURFACE AREA RATIO ON PLANKTON NETS. ALLOWS LONG VERTICAL OR OBLIQUE TOWS WITHOUT NET CLOGGING. USED IN CONJUCTION WITH RELEASE MECHANISM  TO OBSTRUCT MOUTH OPENING AFTER NET IS ACTUATED TO CLOSE AT DEPTH.  CONSTRUCTED FROM HEAVY REINFORCED POLYESTER MATERIAL, REINFORCED AND GROMMETS ON BOTH ENDS TO ACCEPT SS RING AND BRIDLE AND PLAIN LOWER RING (PRICED SEPARATELY ABOVE).

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PUGET SOUND COLLARS   CYLINDRICAL COLLAR USED TO CREATE “NON-FILTERING HEAD SPACE” ABOVE PLANKTON NETS.  FLOWMETERS CAN BE MOUNTED INSIDE TO INTERNAL TABS.  DESIGNED FOR LONG VERTICAL HAULS.  USED IN CONJUCTION WITH RELEASE MECHANISM TO OBSTRCT MOUTH OPENING AFTER NET IS ACTAUTED TO CLOSE AT DEPTH.   CONSTRCTED FROM HEAVY REINFORCED POLYESTER MATERIAL, GROMMETED BOTH ENDS TO ACCEPT SS RING AND BRIDLE AND PLAIN LOWER RING (PRICED SEPERATLY ABOVE)

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