The main purpose

It is used to test the filtration efficiency of daily protective masks, medical masks and respirators for particulate matter. Applicable to medical device inspection centers, safety protection inspection centers, labor protection inspection centers, drug inspection centers, disease prevention and control centers, textile inspection centers, hospitals, masks and respirator manufacturers, etc.

Technical index

1. The cold-generating aerosol generator is used to generate 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 particle leakage prevention design in the whole process protects the safety of experiment personnel.

4. Aerosol generator: compatible with salt and oil.

5. Equipped with aerosol particle electrostatic charge neutralization device.

6. The pneumatic clamp is equipped with a protection device, which is safe and convenient to use.

7. Equipped with temperature and humidity sensor, 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. Detection range of filtration efficiency: 0-99.999%.

10. Filter efficiency detection flow meter range (10-100) L/min, precision 2.5.

11. Filter efficiency sampling frequency: 2 times/min.

12. Filtration efficiency, particle concentration: (20-30) mg/m3; counting median diameter: salt particles (0.075±0.02) μm, oil particles (0.185±0.02) μm; 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: The computer controls the test process, automatically collects data, and is equipped with a dedicated computer and test software.

15. The computer automatically tests the gas concentration and automatically calculates the filtration efficiency; it can save, output, query, and print the test data.

16. Power supply: AC220V 50Hz

Applicable standards (for different standards, different accessories are required)

GB/T 32610-2016 Daily protective mask technical specification 6.13 (Appendix A)

GB 2626-2019 Respiratory protection-Non-powered air-purifying particle respirator

GB 2890-2022 Respiratory protection-Non-powered air-purifying gas mask

GB 19082-2023 Disposable protective clothing for medical use

GB 19803-2023 Protective face mask for medical use

YY 0469-2011 medical surgical mask

YY/T 1642-2019 Single-use medical protective hood

YY/T 1633-2019 Single-use medical protective overboot

YY/T 1799-2020 Technical requirement of re-usable protective clothing for medical use 4.3.4.2