G PHYSICS
G01 MEASURING; TESTING
G01N INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N33/00 Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
G01N33/48 Biological material, e.g. blood, urine; Haemocytometers