Product Mode： Fixed mode of products： Test Speed： Number of tests： Equipment size： Description: It is used to test the percentage of the mask material to filter out the suspended particles containing bacteria under the specified flow rate. The dual gas path contrast sampling method is adopted to improve the accuracy of sampling, which is suitable for the performance test of the bacterial filtration efficiency of medical surgical masks by detection units, measurement units, and medical mask manufacturers. The cabinet adopts a glass door structure, which is convenient for the experimenter to observe and operate. Install high-brightness lighting in the cabinet. Using 17-inch industrial computer and independent research and development PLC control.