I. Scope of application:
     Mask automatic filtering efficiency tester is used to test the protection effect and filtering efficiency of daily protective masks and respirators on particulate matter. It is produced by manufacturers and has high cost performance.
Standards:
     GB / T32610-2016, GB / T2626-2006, GB / T19082-2009, GB / T19083-2010, YY0469-2011
Test system:
     1. Fully automatic control of working conditions without manual monitoring;
     2. Does not require manual monitoring, saving time and labor costs to a large extent;
     3. Guided setting to avoid misoperation;
     4. Advanced testing accessories to ensure more reliable test results;
     5. Realize continuous operation, reduce downtime and operator workload.
Fourth, the basic structure of the mask automatic filter efficiency tester:
     1. Dust generation system: Compressed filtered air system cooperates with aerosol generator to provide a certain amount of test dust;
     2. Test cavity: main test cavity and specimen clamping;
     3. Monitoring and adjustment system: pressure monitoring and adjustment, providing a dynamic test environment;
     4. Results display and analysis system: monitor the aerosol penetration and display test results.
V. Specifications:
     * Aerosol type: PAO, DOP, DEHS, paraffin
     * Aerosol type: Nacl
     * Median mass diameter: 0.26μm
     * Number median diameter: 0.075μm
     * Geometric standard deviation: ﹤ 1.83
     * Aerosol concentration: 12 ~ 20mg / m3
     * Aerosol detection method: near-field light scattering
     * Measuring range: 0.0001 ~ 200mg / m3
     * Accuracy: ± 1%
     * Sample flow range: 10-100L / min
     * Electronic pressure sensor: ± 0.5% FS
     * NIST traceable mass flow meter: 0.5% reproducibility
     * Filtering efficiency measurement range: 0 ~ 99.9995%