The main purpose

It is used to test the filtration efficiency of daily protective masks and medical masks on particulate matter, and to determine the obstructive performance of ordinary fabrics and medical protective masks against constant flow of airflow. 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, mask manufacturers, etc.

Technical index

1. The cold-generating aerosol generator is used to produce continuous and stable aerosol particles, which is convenient for filling the solution.

2. A high-precision PM2.5 sensor is used to measure the 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 particles electrostatic charge neutralization device.

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

7. Equipped with glass rotor flowmeter, vacuum pump, PM2.5 sensor.

8. Detection range of filtration efficiency: 0-99.999%.

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

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

11. 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%.

12. Differential pressure sensor range: 0～500Pa

13. Control system: The computer controls the test process, automatically collects data, and is equipped with a dedicated computer and test software.

14. The computer automatically tests the gas concentration in the upper and lower chambers, the airflow resistance on both sides of the sample, and automatically calculates the filtration efficiency; it can save, output, query, and print the test data.

15. Power supply: AC220V 50Hz

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

GB/T 32610-2016 Technical Specification for Daily Protective Masks, 6.13 (Appendix A)

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

GB 19082-2023 Disposable protective clothing for medical use

GB 19803-2023 Protective face mask for medical use

TAJ 1001-2015 PM2.5 protective mask

YY 0469-2011 Medical surgical mask

YY/T 1642-2019 Single-use medical protective hood
YY/T 1633-2019 Single-use medical protective overboot

GB/T38880-2020 Technical specification of children mask

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