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The particle filtration efficiency tester is a combination of salt spray aerosol generation system, electrostatic route system, mixing chamber, aerosol switching system, etc., and the tester is also equipped with pneumatic fixtures and protection devices, which will be safer to use , More convenient.

1. The structure of the particle filtration efficiency tester
1. Salt spray aerosol generation system: it can produce salt aerosol that meets the standard particle size distribution requirements;
2. Salt spray aerosol heating system: produces salt particles;
3. Electrostatic route system: used to neutralize static electricity in salt spray aerosol;
4. Mixing chamber: mixing heating gas and salt spray aerosol to produce salt particles that meet the requirements;
5. Aerosol switching system: convenient for switching aerosols;
6. Filter material clamp: used to hold filter material or melt blown filter material;
7. Differential pressure sensor: used to measure the pressure difference between the upstream and downstream of the filter material;
8. Particle counter: used to measure the number of particles upstream and downstream of the filter material;
9. Flow controller: control, adjust and measure air volume.

2. The characteristics of the particle filtration efficiency tester
1. The cold-generating aerosol generator is used to produce continuous and stable aerosol particles, which is convenient for filling the solution;
2. Use high-precision PM2.5 sensor to measure aerosol concentration;
3. The whole process of particle leakage prevention design to protect the safety of experimenters;
4. The equipment is equipped with a salt particle aerosol generator;
5. Equipped with aerosol particle electrostatic charge neutralization device;
6. The equipment is equipped with pneumatic clamps and protection devices, which is safe and convenient to use;
7. Equipped with temperature and humidity sensors, real-time display of environmental temperature and humidity (temperature and humidity requirements: 25?±5?, 30%RH±10%RH);
8. Equipped with glass rotor flowmeter, vacuum pump, laser dust particle counter;
9. The computer controls the test process, automatically collects data, configures the computer and test software;
10. The computer automatically tests the gas concentration and automatically calculates the filtration efficiency;
11. Test data can be saved, output, inquired, and printed.

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