LFY-709 Medical Mask Ventilation Resistance Tester

Main application
It is suitable for measuring the ventilation resistance of medical surgical masks and disposable medical masks, and can also be used to measure the ventilation resistance (gas exchange pressure difference) of other materials. 
Instrument Characteristics
1. The instrument uses an aspirating air source as its power source, which is not limited by the space of the testing site.
2. It is equipped with a high-precision differential pressure sensor, which displays the differential pressure between the two sides of the sample digitally.
3. Special sample holders ensure a firm grip on the sample.

Technical Specifications
1. Air source: Aspirating type;
2. Air flow rate: 8 L/min, flow measurement range: 0 - 10 L/min ± 0.5 L/min;
3. Sealing method: End face sealing;
4. Sample ventilation aperture: Ф25mm;
5. Differential pressure sensor range: 0 - 500 Pa, accuracy: ±1%;
6. Display method: Digital display of pressure difference;
7. Power supply: 220V, 50Hz.

Applicable Standards 
YY 0469-2023  "Medical Surgical Masks" 
YY/T 0969-2023 "Single Use Medical Masks" 
FZ/T 64114-2024 Technical Specification for Nonwoven Fabrics Produced by Meltblowing Method for Masks 

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LFY-214 Fabric Surface Water Resistance Testing Instrument 

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