PLANKTON NETS

WATER SAMPLERS

SEDIMENT CORERS

PLANKTON SAMPLERS

LABORATORY EQUIPMENT

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, or 1:6; nets include a brass ring choke band (except Puget Sound Net)
    
    
• stainless steel ring and three point bridle:
  • ring diameters (cm): 13, 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:
  • two piece PVC design with stainless steel fasteners (see Simple Plankton Nets for details
  • 200ml (6.4 cm diam.), 500 ml (8.9 cm diam.) or 750ml (11.4 cm diam.) buckets available
    
    
• 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

CLOSING PLANKTON NET PRICE LIST (US$)

RING AND BRIDLE ASSEMBLIES, ALL SS CONSTRUCTION W/ THREE POINT RING AND BRIDLE, COMPLETE

REDUCTION COWLINGS, TAPERED COLLAR. (A.K.A. WISCONSON 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 OBSTRCT MOUTH OPENING AFTER NET IS ACTAUTED TO CLOSE AT DEPTH.  CONSTRUCTED FROM HEAVY REINFORCED POLYESTER MATERIAL, REINFORCED AND GROMMETED BOTH ENDS TO ACCEPT SS RING AND BRIDLE AND PLAIN LOWER RING (PRICED SEPERATLYABOVE).

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)

CHOKE BAND ASSEMBLIES USED IN CONJUCTION WITH RELEASE MECHANISM TO OBSTRCT OR “CHOKE” MOUTH OPENING AFTER NET IS ACTAUTED TO CLOSE AT DEPTH. CONSTRCTED FROM HEAVY REINFORCED POLYESTER MATERIAL, GROMMETED, SS RINGS, THROTTLE ROPE W/ SS RING, COMPLETE

RELEASE MECHANISMS AND MESSENGERS

1. SNAP-SHACKLE RELEASE MECHANISM (FOR 15, 20 AND 30 CM DIAM. NETS AND DEPLOYMENTS LESS THAN 50 M DEEP, SHARP-TUG ACTUATES CLOSURE) COMPLETE W. TROTTLE STRAP/CABLE
INSTALLED: $75

2. SINGLE RELEASE MECHANISM. MESSENGER ACTUATED, POLYETHYELENE/SS
CONSTRUCTION, LIGHT DUTY, SOLID BRONZE MESSENGER 300 GM, COMPLETE: $135

3. SINGLE RELEASE MECHANISM. MESSENGER ACTUATED, CAST BRONZE, HEAVY DUTY,
WIRE STOP, ONE-EA CAST BRONZE SPLIT MESSENGER X 1000 GM, COMPLETE: $695

4. DOUBLE RELEASE MECHANISM. MESSENGER ACTUATED CAST BRONZE, HEAVY DUTY,
WIRE STOP, TWO-EA CAST BRONZE SPLIT MESSENGER X 1000 GM, COMPLETE: $950

MESSENGER, CAST BRONZE, 1000GM, SPLIT W/ LANYARD, COMPLETE: $75 
MESSENGER, CAST BRONZE, 333 GM,  SOLID, COMPLETE: $18 

COD END ASSEMBLIES, 2-PC PVC CONSTRUCTION, LOWER SECTION DETACHABLE WITH LATERAL APERUTRES AND LINED W/ SPECIFIED MESH, ALL COMPUTOR MADE, SS HOSE CLAMP, ANY MESH SIZE AVAILABLE, COMPLETE

(OPTIONAL) EXTENSION ASSEMBLY FOR ABOVE COD END ASSEMBLIES USED TO INCREASE FILTRATION AREA OR RESERVOIR VOLUME ON ABOVE COD END ASSEMBLIES. AVAILABLE IN PERFORATED (SPECIFY MESH SIZE) OR NON PERFORATED FORM, COMPLETE

(OPTIONAL) BALLAST WEIGHTS FOR ABOVE COD END ASSEMBLIES, USED TO INCREASE WEIGHT OF COD END ASSEMBLY, ZINK CONSTRUCTION W/ SS HARDWARE, COMPLETE