Counting chambers, Thoma ruling

Double net ruling, includes 2 haemocytometer glass covers, with LOT number on the packaging, labelled with: usable until, CE pursuant to IVD 98/79 EC. Grid is the same as the grid in the centre of large square in the Neubauer chamber. The area of the small square is 0.0025 mm². Since the large outer squares are not included, the Thoma system is only used to count thrombocytes and erythrocytes.