Assistent Counting Chamber

Counting chamber, double ruling
with 2 optically plane cover glasses in a transparent plastic box
Improved Neubauer ruling
9 large squares of 1 mm = 9 mm
The central square of 1 mm contains 25 groups of squares divided into 16 mini squares of 0.05 x 0.05 mm each.
Leucocytes counting: 4 corner squares like Neubauer
Erythrocytes counting: groups of squares are used
Triple marginal lines at all sides of the square groups distinguish this ruling from Neubauer. The middle line is decisive for the counting.