Sedgewick Rafter Cell

Gridded Sedgewick Rafter Cell for Plankton Counting • Millimeter square grid - Save time counting zooplankton • Standard Methods recommended way to count zooplankton in the 400 to 1000 um range Just in time to make your hours in the lab more productive. Let statistics - and the accuracy of our grid - do the counting. There’ s no need to count what’ s in the entire cell; extrapolate the number of “ critters” in a portion of the cell. Contains a 1 x 3” glass slide mounted on a brass frame and meticulously drawn with a millimeter square grid in a chrome-on-glass procedure. Cell is 50 mm x 20 mm x 1 mm with a volume of 1.0 mL. Lines of grid are .0007” ( 0.18mm) wide. There is one microliter of water per gridded square of the cell. Specifications: • Frame: brass, mounted on 1 " x 3 " glass slide. • Cell size: 50 mm x 20 mm x 1 mm ( 1.968 " x 0.787 " x 0.04 " ) • Cell volume: 1.0 mL • Includes: 2 cover glasses. • SR-02 : Gridded model includes 1mm x 1mm grid etched on slide with 1 microliter of fluid per gridded square.