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Masks Bacterial Filtration Efficiency Tester is used to determine the bacterial filtration efficiency (BFE) of medical face masks, surgical face masks, to identify the protective performance from being exposed to bacterial airborne environments, tester can conduct the tests defined in EN 14683, ASTM F2100, ASTM F2101, YY 0469, YY 0969
| Main parameters | Scope | Resolution | MPE (Maximum Permissible Error) |
| Sample Flow Rate of A | 28.3L/min | 0.1L/min | ±2.5% |
| Sample Flow Rate of B | 28.3L/min | 0.1L/min | ±2.5% |
| Spray flow | (8～10)L/min | 0.1L/min | ±5.0% |
| Peristaltic pump flow | (0.1～3.0)mL/min | 0.1mL/min | ±2.5% |
| Front pressure of flow meter A | (-20～0)kPa | 0.01kPa | ±2.5% |
| Front pressure of flow meter B | (-20～0)kPa | 0.01kPa | ±2.5% |
| Front pressure of front pressure | (0～300)kPa | 0.1kPa | ±2.5% |
| Negative pressure aerosol chamber | (-90～-120)Pa | 0.1Pa | ±2.0% |
| Operation temperature | (0～50)℃ |
| Cabinet negative pressure | (-50～-200)Pa |
| Data storage capability | ＞100000 groups |
| Characteristics of efficiency air high filter | Filter efficiency for particles is above 0.3um ≥ 99.99% |
| Mean mass diameter of aerosol | Average particle diameter is (3.0 ± 0.3)μm, geometric standard deviation ≤ 1.5 |
| Captured particle size of Two-way 6-stage | Ⅰ level > 7 microns, Ⅱ level (4.7 ~ 7) microns, Ⅲ level (3.3 ~ 4.7) microns, Ⅳ level (2.1 ~ 3.3) |
| Anderson sampler | microns, Ⅴ microns (1.1 ~ 2.1), level Ⅵ microns (0.6 ~ 1.1) |
| Aerosol chamber specifications | (length 600× diameter 85× thickness 3) mm |
| Total number of positive quality control sampler particles | (2200±500) CFU/mL |
| Ventilation flow rate of negative pressure cabinet | ≥5m3/min |
| Dimensions of negative pressure cabinet door | (length 1000× width 730) mm |
| Host size | (length 1180× width 650× height 1300) mm |
| Stent size | (length 1180× width 650× height 600) mm, height adjustable within 100mm |
| Power | AC220 V±10%，50 Hz |
| Weight | 250 kg |
| Overall power consumption | ＜1500W |
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