WT-GL20L automatic filtration efficiency and

Used for testing the particle filtration efficiency of salt and oil substances in masks and meltblown fabrics, especially for testing the salt and oil substance filtration efficiency of N95 and N99 masks.

YY/T 0469-2013 Medical Surgical Masks

GB 2626-2019 Respiratory protective equipment - Self suction filtering particulate matter respirator

GB/T 32610-2016 Technical Specification for Daily Protective Masks

GB 19083-2010 Technical Requirements for Medical Protective Masks

GB 19082-2009 Technical Requirements for Medical Disposable Protective Clothing

GB/T 38880-2020 Technical Specification for Children's Masks

1. Resistance detection: The resistance pressure difference of the filter material will be obtained through the static pressure rings of its upstream and downstream testing chambers, and a high-precision differential transmitter will be used to ensure the accuracy and stability of the pressure difference.

2. Efficiency detection: High precision photometer is used to detect the concentration of upstream and downstream particles, ensuring accurate, stable, fast, and effective sampling.

3. Flow detection: The system testing flow is mainly provided by dry and clean compressed air from the outside, and there is an internal pressure and flow stabilizing device installed to ensure the stability of the detected flow. An automatic control system is used for simplicity, speed, and stability.

4. Aerosol generation: Adopting a multi nozzle design, salt and oil testing can be conducted on the same instrument to ensure rapid and stable adjustment of aerosol concentration.

5. Test results: Equipped with a 7-inch touch screen display, the test results are directly displayed on the interface, and users can choose to directly or save data.

6. Data Port: External storage card, capable of exporting data without worrying about data loss.

7. Easy to operate: Users only need to place the filter paper in the fixture, press the button, adjust the test flow rate, and the system will automatically test resistance and efficiency. The entire process is simple, fast, and efficient.

8. Test flow range: 25-100L/Min (standard condition 85L/Min)± 2.5% (adjustable) resolution 0.01/min

9. Test sample size: 100 cm ², equipped with multi specification fixtures (flat mask, 3D mask fixture, N95 mask fixture, children's mask fixture)

10. Resistance test: Range 0-1000Pa, accuracy up to 0.1Pa

11. Efficiency Test: Efficiency Range 0% -99.999%

12. Aerosol type: NaCl, DEHS

13. Measurement range of photometer: 1ug/m³-200mg/m ³ Sensitivity: 1ug/m ³

14. Air pump: continuous and stable operation

15. Data memory capacity 1-1000 sets of measurement data, can be exported

16. Screen display: Color 7-inch touch screen

17. Printing method: Built in thermal printer

18. Data export interface USB

19. Test time: 5-70 seconds

20. Gas source requirement: 0.5MPa, 180L/Min

21. Material: Shell steel plate baked paint, test component SUS304 stainless steel

22. Built in high-precision electronic flowmeter and high-performance sampling pump to ensure flow stability.

23. Built in compressor with automatic pneumatic clamping function.

24. Comes with a built-in anti-static device.

25. Automatic infrared anti pinch protection function to protect personnel safety.

26. No aerosol leakage, high personnel protection.

27. Automatic control of aerosol generation, automatic calculation of particle efficiency and mask airflow resistance, reducing human intervention.

1. Aerosol generator: 2 units

2. 2 photometers

3. Differential pressure transmitter

4. Temperature and humidity sensor

5. Electrostatic neutralizer

6. Programmable Logic Controller (PLC)

7. Touch screen

8. Standard fixtures (flat mask, 3D mask, N95 mask)Children's masks）

Main parameters of two photometers:

Instrument detection concentration range: (0.001-200) mg/m³

Resolution: 1 ug/m ³

Instrument sampling flow rate: 2 L/min (fixed)

Air inlet: outer diameter 6mm

Flow stability: ± 3%

Two main parameters of aerosols:

1. Two aerosol generators

NaCl (KCl) aerosol generator, DEHS aerosol generator

NaCl salt aerosol with a dust concentration of 30-200mg/m ³, adjusted by atomization pressure.

The median diameter of the count is CMD0.075 ± 0.02 μ m. The geometric standard deviation of particle size distribution is less than 1.86.

DEHS oil-based aerosol, with a dust concentration of 20-200mg/m ³, can be adjusted by adjusting the concentration through atomization pressure.

The median diameter of the count is CMD0.185 ± 0.02 μ m. The geometric standard deviation of particle size distribution is less than 1.6.