The application discloses a light-proof
flow cell and relates to the field of
particle counter accessories, which comprises a first shell and a second shell, flow holes are formed in the first shell and the second shell, a wear-resistant light-
blocking layer is arranged between the first shell and the second shell, a plurality of first plug-in holes are formed in the second shell, and a plurality of corresponding first plug-in columns are arranged in the plurality of first plug-in holes. The first shell and the second shell are made of
quartz diamond material, and the
hardness is high, so that the contact with the detection liquid is
diamond material, the
wear resistance can be improved, the first plug-in hole and the first plug-in column are arranged at four corners and are matched, and the
butt joint precision is improved, so that the
grinding effect of the flow holes by the
grinding liquid can be effectively reduced, the phenomenon that the pore size of the
flow cell becomes large can be avoided, and therefore the accuracy is not greatly affected during counting, and the stability during use and the counting accuracy are improved.