LFY-719B Inward Leakage Rate Tester

Main application
It is used for testing the inward leakage rate of particulate matter in masks, face shields, respirators and protective masks. It is applicable to labor safety protection inspection centers, medical device and pharmaceutical inspection centers, disease control centers, textile testing centers, mask and mask enterprises, etc.

Technical Specifications
1. Volume of NaCl particle aerosol generation: not less than 100L/min
2. Concentration of NaCl particles: (8 ± 4) mg/m³, (10 ± 1) mg/m³
3. Aerodynamic properties of NaCl particles: particle size distribution (0.02 - 2) μm; mass median diameter approximately 0.6 μm
4. Dynamic range of laser photometer and particle detector: 0.001 - 200mg/m³; accuracy ± 1%; response time no more than 500ms
5. Adjustment range of sampling pump: 0.50 - 4L/min
6. Sampling flow rate of particles: 1 - 2L/min
7. Two particle concentration detectors
8. Treadmill: running speed (5 ± 0.5) km/h, with timing function
9. Equipped with a dedicated computer and dedicated software for controlling the test, software supports data storage, query, export, etc.
10. Real-time display of inward leakage rate, automatic calculation of inward leakage rate
11. Can directly set the initial parameters such as test parameters and test status.
12. Intuitively display the concentration of the test chamber and sampling port.
13. Automatically calculate the single test result.
14. After the test, automatically calculate the single inward leakage rate at each sampling position; the total inward leakage rate of each tested protective suit; the total inward leakage rate of each tested object; the total inward leakage rate of each test action; the total inward leakage rate at each sampling position; the average total inward leakage rate; 。
15. The detection chamber is airtight and meets the requirements of standard tests. The tested personnel perform their actions according to the standard procedures.
16. The environmental temperature inside the detection chamber is (20 ± 5)℃, and the relative humidity is no more than 60%.
Applicable standards
GB 24539-2021 Protective Clothing - Chemical Protective Clothing - Appendix B Method 1 (Laser Photometer), Appendix D 
GB 2890-2022 Respiratory Protection Self-Contained Filtering Respirator 
LFY-719B Inward Leakage Rate Tester