PLANKTON NETSSimple Plankton Nets
Closing Plankton Nets
Bongo Plankton Nets
Multi-Net (Tucker) Trawl
Student Plankton Nets
Stream Sampling Nets
WATER SAMPLERSHorizontal Water Samplers
Vertical Water Samplers
Student Water Samplers
Limnology Field Kits
SEDIMENT CORERSUniversal Percussion Corer
Russian Peat Borer
Piston Interface Corer
Large Bore Sediment Sampler
Extension Rods and Percussion
Core Extruding Apparatus
Discrete Point Piston Corer
PLANKTON SAMPLERSPlankton Traps
Haney Grazing Chambers
Limnocorrals, Microcosms, Enclosures
LABORATORY EQUIPMENTUtermoehl (Phytoplankton) Sedimentation Chambers
Folsom Plankton Sample Splitter
Motoda Plankton Sample Splitter
Zooplankton Counting Trays
Haney Grazing Chambers
The Haney Grazing Chamber (Haney;1971) was developed to gently trap zooplankton while automatically exposing the enclosed assemblage to trace amounts of radio-labelled food particles. Isolated in-situ, the animals are allowed to feed on the suspension for a short period. Upon retrieval, the sample is filtered and zooplankton are assayed for ingested particles.
High sensitivity, simple measurements and naturalness of conditions are offered by this well known experimental technique. A characteristic design feature of the grazing chamber are rotational polycarbonate lids within a clear polycarbonate tube, similar to a "butterfly-valve", where integral silicone "O" rings seal against the cylinder wall in horizontal and watertight position.
Pivotal lids, articulated by a Delrin® linkage, are held in the "open" position by a messenger release mechanism during deployment. As a messenger strikes the release mechanism, gravity pulls the weighted (by stainless steel tube) cylinder downward while the lids rotate to the horizontal (closed) position.
Immediately, as the lids of the chamber close, the piston is forcefully ejected to release labeled particles into the chamber. Using the key innovative design features of the original sampler, the ARI/Haney Grazing Chamber is a simplified version of the original design constructed using advanced plastics.
The improved Grazing Chamber, also offered as economical ARI/Haney Water Sampler, has enhanced technical capabilities over the original sampler including:
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