LFY-719B inward leakage rate tester
 Main purpose
Used for testing the inward leakage rate of particulate matter in masks, face masks, respirators, and gas masks, applicable to labor safety protection 
inspection centers, medical device and drug inspection centers, disease control centers, textile testing centers, mask and mask enterprises, etc.
technical parameter
1. NaCl particulate aerosol generation gas volume: not less than 100L/min
2. NaCl particle concentration: (8 ± 4) mg/m ³、 (10 ± 1) mg/m ³
3. Aerodynamics of NaCl particles: particle size distribution (0.02-2) μ M; The median diameter of the mass is about 0.6 μ M
4. Dynamic range of laser photometer and particle detector: 0.001~200mg/m ³； Accuracy ± 1%; Response time not exceeding 500ms
5. Sampling pump adjustment range: 0.50-4L/min
6. Particle sampling flow rate: 1-2L/min
7. 2 particle concentration detectors
8. Treadmill: running speed (5 ± 0.5) km/h, can be timed;
9. Equipped with dedicated computers and software for control testing, the software supports data storage, querying, exporting, etc
10. Real time display of inward leakage rate and automatic calculation of inward leakage rate
11. It can intuitively set initial parameters such as testing parameters, testing status, etc.
12. Visually display the concentration of the testing chamber and sampling port;
13. Automatically calculate single test results;
14. Automatically calculate the individual inward leakage rate for each sampling position after the test is completed; 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 location; Average total inward leakage rate;.
15. Equipped with an airtightness testing room that meets standard test requirements, the tested personnel follow standard procedures for operation.
16. Detect the ambient temperature inside the warehouse (20 ± 5) ℃, and the relative humidity should not exceed 60%
Applicable standards
GB 24539-2021  Protective clothing- Chemical protective clothing