Brand : GESTER
Model : GT-RA02
Lab Location : KSS-505 room at 5th floor of Kasamsri building 
Fundamental : The equipment is proposed for investigating bacterial filtration efficiency of surgical masks by using a bacteria spraying on a sample holder (Called Six-Stage Andersen plate with different pore size sieve). Moreover, The testing method follows international ASTM F2100 and ASTM F2101.
Sampling air flow : 28.3 ± 0.2 L/min
R spray volume: 0.1-10 ± 0.5 L/min
Temperature :0-50 ºC
Mean particle size : 3.0 ± 0.3 µm
Six-stage Anderson sieve sampler : Stage I>7 µm; Stage II (4.7~7 µm); Stage III (3.3~4.7 µm); Stage IV (2.1~3.3 µm); Stage V(1.1~2.1 µm); Stage VI (0.6~1.1 µm)
Type of samples : Surgical masks or Material fabric
Test Method : ASTM F2100 (ASTM F2101)