
Blood analyzers (5-part differential and 3-part differential) must meet GB 9706.1, YY 0505 (domestic), and IEC 60601-1-2 (international) EMC standards. They employ various technologies such as electrical impedance tomography, laser scattering, and fluorescence staining, and include a microporous sheath flow system, high-voltage power supply, laser/photodetector, and fluid circuit system. The standards require effective suppression of switching noise from the high-voltage power supply (used for cell counting), electromagnetic interference from the laser drive circuit, and various pumps and valves, ensuring that these do not affect the accuracy of cell signal acquisition or the precision and accuracy of the instrument.