Technical indicators:

1. The use of a cold gas aerosol generator produces continuous and stable aerosol particles, making it convenient to add the solution.

2. Using high-precision PM2.5 sensors to measure aerosol concentration.

3. Full process particle leakage prevention design to protect the safety of experimental personnel.

4. Two sets of aerosol generators: salt particle aerosol generator and oil particle aerosol generator.

5. Equipped with an aerosol particle electrostatic charge neutralization device.

6. Pneumatic fixture with protective device, safe and convenient to use.

7. Configure temperature and humidity sensors to display real-time environmental temperature and humidity (temperature and humidity requirements: 25 ℃± 5 ℃, 30% RH ± 10% RH).

8. Configure glass rotor flowmeter, vacuum pump, and laser dust particle counter.

9. Filter efficiency detection range: 0-99.999%.

10. Filter efficiency detection flowmeter range (10-100) L/min, accuracy level 2.5.

11. Filtering efficiency sampling frequency: 1-9999 times/min can be set arbitrarily.

12. Filtration efficiency, particle concentration: （20-30）mg/m3； Median diameter of counting: salt particles (0.075 ± 0.02) μ m, oil particles (0.185 ± 0.02) μ m; Geometric standard deviation of particle size distribution: salt particles ≤ 1.86, oil particles ≤ 1.60; Dynamic detection range (0.001-100) mg/m3, accuracy 1%.

13. Instrument accuracy level (precision level): Level 1

14. Control system: computer-controlled testing process, automatic data collection, configuration of dedicated computer and testing software.

15. Computer automatically tests gas concentration and calculates filtration efficiency; Can save, output, query, and print test data.

16. Power supply: AC220V 50Hz