Particle measurement device and particle separation measurement device and particle separation measurement device

摘要

The particle measurement device (3) of the present disclosure has a first inflow port (23) on the upper surface into which a first fluid containing the particles to be measured flows, and the particles connected to the first inflow port (23). Than the first flow path (16) for measurement and the first flow port (23) connected to the upstream side of the connection portion between the first flow path (16) and the first inflow port (23). It has a third flow path (29) having a small width, and the first flow path (16) has a width larger than the width of the third flow path (29) and the width of the first inflow port (23). The width increasing portion (16a) connected to the downstream side of the first plane portion (27), the first plane portion (27), and the second plane portion (16a) connected to the downstream side of the width increasing portion (16a). 28) and.