ASTMF2101 Mask Tester Evaluating Bacterial Filtration Efficiency BFE Of Medical Face Mask Materials Bioaerosol

Main parameters

Parameter range

Resolution

Maximum allowable error

A channel sampling flow rate

28.3L/min

0.1L/min

better than ±2.5%

B channel sampling flow rate

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

(0.006～3.0)mL/min

0.001ml/min

better than ±2.5%

Front pressure of channel A

(-20～0)kPa

0.01kPa

better than ±2.5%

Front pressure of channel B

(-20～0)kPa

0.01kPa

better than ±2.5%

Pressure before spray flowmeter

(0～300)kPa

0.1kPa

better than ±2.5%

Aerosol chamber negative pressure

(-90～-120)Pa

0.1Pa

better than ±2.0%

Operating temperature

(0～50)℃

Cabinet negative pressure

(-50～-200)Pa

Data storage capacity

＞100000 group

HEPA filter characteristics

Filtration efficiency for particles above 0.3um ≥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 captures particle size

Ⅰ＞7μm,Ⅱ(4.7～7)μm,Ⅲ(3.3～4.7)μm,Ⅳ(2.1～3.3)μm,Ⅴ(1.1～2.1)μm,Ⅵ(0.6～1.1)μm

Aerosol chamber specifications

(Length 600 x diameter 85 x thickness 3) mm

Total number of positive QC sampler particles

(2200±500)cfu

Negative pressure cabinet ventilation flow

≥5m3/min