Used for vertical tows, the main design feature
of the Wisconsin net is the anterior reducing cone
which makes this sampler more efficient than a
standard conical net. The sampler consists of three
major parts: reducing cone, filtering net and
specially designed net/bucket adapter with screw on
stainless steel plankton bucket. Screw on bucket
holds tighter to net, eliminating leaking bottles
and awkward hose clamps.
Net measures 30" long with a 5" diameter mouth
opening. The net is 7" in diameter where the filter
net meets the reducing cone. It is constructed with
stainless steel net frames, brass bridle and Nitex«
nylon net with 80Ám mesh or 153Ám.
604-157 Wisconsin Net, 80Ám 2 lbs.
604-159 Wisconsin Net, 153Ám 2 lbs.
Sedgewick-Rafter Counting Cell
This is used for counting zooplankton samples. A
1 ml counting cell 45 mm long, 20 mm wide, and 1 mm
high. Precision rectangular brass cell is bonded to
a 1" x 3" (25 mm x 75 mm) glass slide. It is
supplied with two extra cover glasses and a plastic
604-165 Wildco« Sedgewick-Rafter Counting Cell 0.1
604-166 Replacement Cover Glass, pack of 12 0.1 lb.
Net Totalizing Flowmeter
This Totalizing Flowmeter is ideal for
determining water speed, volume or distance. These
are general purpose instruments for flow
measurements with plankton nets to determine water
volume for each tow. Each flowmeter is made with a
nickel-plated brass nose cone, clear polycarbonate
body, and is properly balanced to maintain
horizontal position when suspended from the towing
line. The precision molded rotor is coupled directly
to a six digit counter that registers each
revolution and displays it on an odometer. After
sampling, remove meter and record reading and time.
Subtracting the first reading from the second gives
you your average speed over the sampling time. The
flowmeter has unlimited depth capacity and includes
an 8 3/4" long flowmeter, 18" stainless steel tow
line and stainless steel connecting axle pin. Choice
of standard or low speed impellers.
Standard Impeller. For use in oceans, rivers,
open channels or with towed nets. Range: 10 cm/sec.
- 79 cm/sec. 6 digit counter measures 999999 counts,
approximately 14.5 nautical miles. 2 3/4" diameter.
Low Speed Impeller. Features a 6 1/2" wide
two-blade gray impeller with more surface area to
sense slower currents. Range from 2 cm/sec. to 100
cm/sec. Replacement low speed impeller converts
standard flowmeter to low speed.
604-172 Standard Impeller - 6 digit counter 1 lb.
604-173 Low Speed Impeller - 6 digit counter 1.3