Hemocytometer

What it is

A counting chamber with an engraved grid of known volume and depth that allows blood cells to be counted under the microscope and their concentration calculated, devised by Louis-Charles Malassez.

What it led to

• Manual counting of red and white blood cells in clinical laboratories
• Variants such as the Neubauer and Fuchs-Rosenthal chambers
• Counting of spores and microorganisms in food
• Precursor of automated cell counters

Links

Sources✓ verified 2026-09-28

• https://en.wikipedia.org/wiki/Hemocytometer
• https://www.revvity.com/ask/history-of-the-hemocytometer