Medical Face Mask Bacterial Filtration Efficiency (BFE)Tester

Face Masks Viral Filtration Efficiency Tester
-is to determine the bacterial filtration efficiency (BFE) of medical face mask materials by employing a ratio of the upstream bacterial challenge to downstream residual concentration of the tested medical face mask materials. The tester provides certain flow rate of bacterial aerosol. The operator can measure the number of colony forming units passing through the medical face mask material, which is clamped between a six-stage Anderson cascade impactor and an aerosol chamber, expressed as a percentage of the number of colony forming units present in the challenge aerosol.

Standards
EN 14683 Medical face masks-Requirements and test methods.
ASTM F2101 Standard Test Method for Evaluating the Bacterial Filtration Efficiency (BFE) of Medical Face Mask Materials, Using a Biological Aerosol of Staphylococcus aureus.
ASTM F2100 Standard Specification for Performance of Materials Used in Medical Face Masks
YY 0469 Technical requirements for surgical mask.

Features
Test types: Penetration efficiency, penetration resistance and flow rate, etc.;
Alarm system: Users can set alarm time points according to their needs, so as to facilitate operation and management;
Data output: RS-232 communication port.

Feature：
1. Negative pressure testing system, which can protect operator’s safety.
2. Peristaltic pump was built in the negative pressure cabinet, A & B two routes 6 level Andersen sampling head.
3. The flow speed of peristaltic pump can be set.
4. The spray flow of bacterial liquid inside the special microbial aerosol generator can be set.
5. Good atomization effect.
6. Embedded high speed industrial microcomputer control.
7. 10.4 "industrial high brightness color touch screen display.
8. USD connector, support USB data archived
9. High brightness light installed in the cabinet.
10.Switching type glass door in front of the machine, easy to observe by the operator.

The main parameters of the mask bacterial filtration efficiency tester:
1.Sampling flow rate of channel A: parameter range, 28.3L / min; resolution, 0.1L / min; maximum allowable error: better than ¯2.5%;
Channel B sampling flow rate: parameter range, 28.3L / min; resolution, 0.1L / min; maximum allowable error: better than ¯ 2.5%;
2.Spray flow: parameter range, (8 ~ 10) L / min; resolution, 0.1L / min; maximum allowable error: better than ¯ 5.0%;
3.Flow rate of peristaltic pump: parameter range, (0.006 ~ 3.0) mL / min; resolution, 0.001ml / min; maximum allowable error: better than ¯ 2.5%;
4.Front pressure of A-channel flowmeter: parameter range, (-20 ~ 0) kPa; resolution, 0.01kPa; maximum allowable error: better than ¯ 2.5%;
Front pressure of B-channel flowmeter: parameter range, (-20 ~ 0) kPa; resolution, 0.01kPa; maximum allowable error: better than ¯2.5%;
5.Front pressure of spray flow meter: parameter range, (0 ~ 300) kPa; resolution, 0.1kPa; maximum allowable error: better than ¯ 2.5%;
6.Negative pressure of aerosol chamber: parameter range, (-90 ~ -120) Pa; resolution, 0.1Pa; maximum allowable error: better than ¯ 2.0%;
7.Data storage capacity:> 100000 groups;
8.High-efficiency air filter characteristics: 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) μm, geometric standard deviation ≤1.5.