A simple design of surprising accuracy commonly used for counting larger plankton. Recommended for its ease of use and reproducible data. Intended for use with either a standard or inverted compound microscope at low magnifications, it limits magnification to about 200 x, which makes it unsuited to examining nannoplankton.
Sedgewick-Rafter cover glass sold in a pack of twelve units.
- 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 - 1801-G20 Gridded model includes 1mm x 1mm grid etched on slide with 1 microliter of fluid per gridded square