The Thoma WBC pipette is a specialized glass diluting pipette for manual white blood cell counts via hemocytometer, creating a precise 1:20 blood-to-diluent ratio essential for accurate leukometry in hematology labs.
Dilution Ratio: 1:20 (leukocytes); markings at 0.5 (blood) and 11 (diluent total).
Design: Larger bulb than RBC pipette with white mixing bead, stem graduated 0-1 (0.5 blood mark), supplied with rubber tubing and mouthpiece.
Material: Borosilicate glass, tolerance ±3%, white backing with blue engravings for readability.
Fill to 0.5 with blood (e.g., EDTA sample), then to 11 with diluent (e.g., 1% HCl or Turk's fluid), mix thoroughly—reliable for low-resource settings, infection screening, and WBC differential counts.
