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What is bacterial filtration efficiency tester for meltblown cloth

2021-02-19 15:28
The bacterial filtration efficiency tester of meltblown cloth adopts the method of simultaneous comparative sampling with two air paths, which is used to test the bacterial filtration efficiency of melt-blown cloth used in the production of masks. What are their characteristics? Below, Qinsun Instruments Co., LTD will give you a detailed explanation.

Applicable standards:
Test method for bacterial filtration efficiency (BFE) in appendix b of YY0469-2011 "technical requirements for medical surgical masks"
Q/0212ZRB003-2011 Bacterial filtration efficiency of medical surgical masks
ASTMF2100, ASTMF2101, European EN14683

Main parameters:
1. sampling flow of route a: parameter range, 28.3L/min;; Resolution, 0.1L/min;; Large allowable error: better than 2.5%;
Sampling flow rate of route b: parameter range, 28.3L/min;; Resolution, 0.1L/min;; Large allowable error: better than 2.5%;
2. Spray flow rate: parameter range, (8 ~ 10) L/min; Resolution, 0.1L/min;; Large allowable error: better than 5.0%;
3. Flow rate of peristaltic pump: parameter range, (0.006 ~ 3.0) ml/min; The resolution is 0.001ml/min;; Large allowable error: better than 2.5%;
4. Pressure in front of the flow meter of Route A: parameter range, (-20 ~ 0) kPa; The resolution is 0.01kPa;; Large allowable error: better than 2.5%;
Pressure before flow meter of route B: parameter range, (-20 ~ 0) kPa; The resolution is 0.01kPa;; Large allowable error: better than 2.5%;
5. Pressure before spray flowmeter: parameter range, (0 ~ 300) kPa; The resolution, 0.1kPa;; Large allowable error: better than 2.5%;
6. Negative pressure of aerosol chamber: parameter range, (-90 ~-120) Pa; Resolution, 0.1Pa;; Large allowable error: better than 2.0%;
7. Data storage capacity: > 100,000 groups;
8. Characteristics of high-efficiency air filter: the filtration efficiency of particles above 0.3um is ≥ 99.99%;
9. Mass median diameter of aerosol generator: average particle diameter (3.0 0.3) μ m, geometric standard deviation ≤1.5.

Bacterial Filtration Efficiency Tester Features:
1. A cold generating aerosol generator is adopted to generate continuous and stable aerosol particles, which is convenient for filling solution.
2. measure aerosol concentration with high precision PM2.5 sensor.
3. The whole process of particle leakage prevention design protects the safety of laboratory personnel.
4. Compatible with respirator samples to test the protective effect and filtration efficiency of particulate matter.
5. 2 sets of aerosol generators: salt particle aerosol generator and oily particle aerosol generator.
6. Equipped with electrostatic charge neutralization device for aerosol particles.
7. Pneumatic fixture is equipped with protection device, which is safe and convenient to use.
8. Configure temperature and humidity sensors to display the environmental temperature and humidity in real time (temperature and humidity requirements: 25℃ 5℃, 30% RH 10% RH).
9. Configure glass rotameter, vacuum pump and laser dust particle counter.
10. Detection range of filtration efficiency: 0-99.999%.

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