Special Counting chambers ( V-slash chambers / Howard / McMaster / Sedgewick Rafter )

Counting chambers Howard with 2 counting lines :

Counting chambers Howard without counting lines :

 Counting chambers McMaster with 2 grids

suitable for solid media for counting worm eggs

dimensions: approx. 75 x 32 mm

the cover glass with 2 counting grids approx. 10 x 10 mm (divided into 10 parts) on 3 supports affixed

distance between bottom plate and cover glass: approx. 1.5 mm

Counting chambers McMaster with 3 grids

for counting worm eggs

suitable for liquid media

dimensions: approx. 127 x 26 mm

depth: approx. 1.5 mm

separate cover glass with 3 counting grids approx. 10 x 10 mm (divided into 10 parts)

with 1 pair of clamps to fix the cover glass

ground edges and rounded corners

Counting chambers Sedgewick Rafter :

Counting chambers acc. to Sedgewick Rafter are intended for counting of particles and microorganisms in water or other transparent liquids.

• the cell of 50 x 20 x 1 mm (= 1 cm³) is ruled in a 1 mm grid subdividing 1 ml in 1000 μl
• supplied with cover glass approx. 60 x 30 x 1 mm

Counting chambers with V-slash :

Counting chambers with V-slash at the exterior sides of the chamber bottom offer various advantages:

• the V-slash facilitates the feeding of the capillary gap between chamber bottom and haemacytometer cover glass
• the risk of overflow is reduced

V-slash  Neubauer Improved is offered by Marienfeld, both dark line and bright line versions are available .