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Bacterial Filtration Efficiency (BFE) Tester
- Bacterial Filtration Efficiency (BFE) Tester
Product Details
1 Overview
Bacterial Filtration Efficiency (BFE) detector is a special instrument for testing the ability of the tested sample (such as masks, etc.) to filter out bacterial particles under specified conditions.
This instrument mainly refers to "Technical Requirements for Medical Surgical Masks" YY0469-2011, Appendix B "Bacterial Filtration Efficiency (BFE) Test Method No. B.1.1.1 Test Instrument", and has been innovatively improved, using dual gas channels for simultaneous sampling Compared with the contrasting method, the sampling accuracy is improved.
This instrument is suitable for measurement and verification departments, third-party testing, textile industry and fiber raw material industry, etc.
2. Instrument characteristics
Ø Negative pressure and closed experimental environment to ensure the safety of operators;
Ø Two-way six-stage Andersen (Andersen) samplers are used for simultaneous sampling;
Ø The sampling chamber has a built-in peristaltic pump, and the flow rate of the peristaltic pump can be set;
Ø High-performance gas atomizer, the flow rate can be set;
Ø Special microbial aerosol generator, good atomization effect;
Ø Embedded high-speed industrial microcomputer control;
Ø 10.4-inch industrial-grade high-brightness color touch screen;
Ø USB interface, support the use of U disk for data transfer;
Ø Support data real-time printing (only V1.06 and subsequent models);
Ø The cabinet has built-in high-brightness lighting and sterilizing ultraviolet lamp;
Ø The front switch type glass door is convenient for the experimenter to observe and operate;
Ø Built-in leakage protection switch to protect the safety of instruments and operators;
Ø The inner layer of the cabinet is integrally processed with stainless steel, and the outer layer is sprayed with cold-rolled plates;
Ø The material between the inner and outer layers has thermal insulation and flame retardant properties;
Ø Detachable bracket, dual-purpose casters for support and movement.
3. Main technical indicators
The main parameters | parameter range | resolution | maximum allowable error |
Left sampling flow | 28.3L/min | 0.1L/min | Better than ±2.5% |
Right channel sampling flow | 28.3L/min | 0.1L/min | Better than ±2.5% |
Spray flow | (8～10)L/min | 0.1L/min | Better than ±5.0% |
Peristaltic pump flow | (0.01～3.0)mL/min | 0.001ml/min | Better than ±2.5% |
Operating temperature | (5～30)℃ | ||
data storage capacity | ＞100000 groups | ||
HEPA filter characteristics | Filtration efficiency for particles above 0.3μm ≥99.99% | ||
Aerosol Generator Mass Median Diameter | Average particle diameter (3.0±0.3) μm, geometric standard deviation ≤1.5 | ||
Dual 6-Stage Anderson Sampler Capture particle size (unit: μm) | Grade I: >7; Grade II: 4.7~7 Grade III: 3.3～4.7 Grade IV: 2.1～3.3 Level Ⅴ: 1.1～2.1 Grade VI: 0.6~1.1 | ||
Aerosol Chamber Specifications | (600×85×3)mm, (length×diameter×thickness) | ||
Total number of particles in the positive quality control sampler | (2200±500) CFU | ||
Negative pressure cabinet ventilation flow | ≥5m3/min | ||
Negative pressure cabinet door size | (1000×730)mm, (length×width) | ||
Host size | (1400×750×2300)mm, (length×width×height) | ||
Working power | AC220V±10%, 50Hz | ||
Instrument noise | ＜65dB(A) | ||
Total Weight | about 350kg | ||
Overall power consumption | ＜1500W | ||
4. Related terms
Ø Bacterial Filtration Efficiency (BFE): Under specified conditions, the efficiency of the tested sample to filter out bacteria-containing particles is expressed as a percentage.
Ø Samples to be tested: masks, textiles and fiber raw materials, etc., are physical barriers provided to prevent the direct penetration of pathogenic microorganisms, body fluids, particles, etc.
5. Working principle
A certain concentration of bacterial aerosol occurs upstream of the sample to be tested. After entering the aerosol chamber and mixing evenly, the bacterial aerosol enters two parallel gas sampling systems. , as a positive quality control, by counting the ratio between the value of the positive quality control and the value of the sample test as the leak rate, thereby obtaining the filtration efficiency.
6. Reference standards
Ø YY0469-2011 Appendix B Bacterial Filtration Efficiency (BFE) Test Method B.1.1.1 Test Instruments;
Ø YY/T 0969-2013 Disposable medical masks;
GB19083 standard
