Counting chambers, improved Neubauer, BLAUBRAND^®, double ruling

Manufactured according to DIN 12 847, including 2 haemacytometer cover glasses.

The ruling shows 9 large squares of 1 mm² each.
The four large squares in the corners marked "L" for counting leucocytes are each subdivided into 16 squares with 0.25 mm sides.
The large square in the center is subdivided into 16 squares with 0.25 mm sides.
The large square in the center is subdivided into 25 group squares of 0.2 mm sides. Each group square consists of 16 mini squares with 0.05 mm sides, each having an area of 0.0025 mm². The 5 group squares in the large central square are used for counting thrombocytes and erythrocytes.

All group squares have triple boundary lines on each side. The central line is the limiting line and determines whether cells in the marginal area shall be included in the count or not.