Blood counting chamber
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Blood Counting Chambers are instruments for precise measuring. They are made of special optical glass and serve to determine the number of particles in liquids, standard counting chambers have counting grids which are engraved into the chamber bottom, under the microscope the counting grid appears as a grid of dark lines. These counting chambers have counting grids which are engraved into an annealed metal coating,under normal microscope settings the counting grid appears as a grid of bright lines,by altering the contrast,the counting grid can also be made to appear dark.
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