WILDCO Standard Ponar Grab 1725-F10 Manual

©2007 - v 5/15
1725-F10 / 1725-F50 Standard Ponar
Safety:
1. Be sure you are able to keep the boat in proper
balance at all times. Lifting the Ponar
into the boat, dumping its contents, and washing
those contents may require leaning over the side
of the boat.
2. Severe injury to fingers or hands can be caused
by movement of the lever arms. Push the safety
pin through both locking holes; unexpected
movement of the lever arms or scoops can be
dangerous.
Introduction:
The standard Ponar sampler has a scoop volume of
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8200 mL and a sampling area of 229 x 229 mm (9 x 9").
It is available with stainless steel scoops and bottom lip or
entirely in stainless steel, for severe conditions. Remov-
able stainless steel top screens, 500 micron, slide on and
off and allow the water to flow through the sampler during
descent. This lessens the frontal shock wave created by
descent and reduces surface disturbance. Both screens
are covered with neoprene rubber flaps that open during
descent and close during retrieval to prevent sample wash
out.
• Materials: Stainless steel or
• Fasteners, screen: 18-8 SS
• Weight: 20 kg (45 lb)
• 4 extra weights: 7 kg (15 lb) total
• Volume: 8.2 L
• Sampling area: 229 x 229 mm (9 x 9")
P/N 031680
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® ®
trademarks of Morris & Lee Inc. All rights reserved.
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Grab
®
zinc-plated steel
/ Morris & Lee Inc. Ponar ,
® ®
Wildlife Supply Company
Description:
The Ponar Grab Sampler enjoys widespread use on
®
all types of bottoms for sampling of benthos sediments,
except the hardest clays, in both fresh and salt water. It is
specifically recommended for:
a. Firm, hard bottoms, free of vegetation, such as sand,
gravel, consolidated marl or clay.
b. Intermixtures of sand, stones, coarse debris
c. Soft or mucky sediments
Wildco's contribution to the popularity of this instru-
ment is the exclusive "Safety Pin" lock. This lock prevents
closing of the dredge until its removal and thus safeguards
you from untimely, unexpected closings.
Sturdily built of all steel, it is a deliberately heavy
device. Its total weight, augmented by extra weights and
the mechanical leverage exerted during the closing action,
allows it to bite deep into the bottom. The unique construc-
tion of jaws with an attached underlip enables the grab
to wipe free most stones and gravel which may jam open
otherwise. Tapered cutting edges assist in easy soil pen-
etration. Closing should occur over 90% of the time. If it
does not, this usually means the device needs to be cleaned
of debris.
The center pivot scoop causes minimal disturbance to
the sample. It samples well, clear firm clay bottoms to the
depth of its scoops, or, if the clay is very hard, as deep as
most aquatic invertebrates dig. Heavy duty hinges easily
absorb heavy impacts. Features include all stainless steel
scoops and bottom underlip and removable stainless steel
top screens which slide on and off. The underlip wipes
clean most pebbles and small cobble that would prevent
the scoops from closing completely. Removable side plates
prevent the lateral loss of sample when scoops are closing.
Scoop volume is 8200 mL.
First produced in 1966, it has remained one of the main-
stays in environmental science.
Note: Studies made in Lake Michigan by .A. Robertson and
C.F. Powers of the Great Lakes Research Division, University
of Michigan at Ann Arbor, indicate the Ponar is a more efficient
quantitative sampler of the macrobenthos than the orange peel,
Petersen, or Smith-McIntyre. Study depth ranged from 23 to 150
meters in variety of hard and soft sediment types.
Grab
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