Instrument: Sedgewick Rafter Counting Chamber

Sedgewick Rafter Counting Chambers are transparent slides widely water analysis, culture inspection, and for other applications where particles per unit volume in fluid must be determined. The slide has a base that is ruled in one-thousand 1-millimeter squares. When a liquid is held in the cell by a coverglass, the grid subdivides 1 milliliter of liquid into 1 microliter volume.