Mask Bacterial Filtration Efficiency (BFE) Tester

WKS-1010 Mask Bacterial Filtration Efficiency (BFE) Tester is designed to assess the percentage of mask material capable of filtering out suspended particles containing bacteria at a specified flow rate. It is applicable for evaluating the bacterial filtration efficiency of medical surgical masks by metrological inspection departments, scientific research institutes, medical mask manufacturers, and other relevant entities.

Standard: ASTM F2100 “Standard Specification for Performance of Materials Used in Medical Face Masks” YY0469-2011, YY/T 0969-2013

Specification:

• Main parameter
• Parameter range
• Resolution
• Accuracy
• Sampling flow: 28.3L/min, 0.1L/min, Better than ±2.5%
• Spray flow: (8～10)L/min, 0.1L/min, Better than ±2.5%
• Peristaltic pump flow: (0.006～3.0)ml/min, 0.001ml/min, Better than ±2.5%
• Front pressure of flowmeter: (-20～0)KPa, 0.01KPa, Better than ±2.5%
• Front pressure of Spray flowmeter: (0～300)KPa, 0.1KPa, Better than ±2.5%
• Ambient temperature: (-40～99)℃, 0.1℃, Better than ±2.5%
• Negative pressure of aerosol chamber: (-90～-120)Pa, 0.1Pa, Better than ±2.0%
• Negative pressure of cabinet: -50～-200Pa
• Data storage capacity: >100000 groups
• Specification and quantity of vortex mixer test tube: Φ16×150mm tube;8
• High efficiency air filter characteristics: Filtration efficiency for particles above 0.3um≥99.99%
• Mass median diameter of aerosol generator: 3.0± 0.3μm, Geometric standard deviation≤1.5
• Integrated 6 Grades Andersen Sampler capture particle size: Grade I＞7μm, Grade Ⅱ(4.7～7)μm, Grade Ⅲ(3.3～4.7)μm, Grade Ⅳ(2.1～3.3)μm, Grade Ⅴ(1.1～2.1)μm, Grade Ⅵ(0.6～1.1)μm
• Aerosol chamber specifications: 60cm(Length)×8.5 cm(Diameter)× 3cm(Thickness)
• Total number of particles of positive quality control sampler: 2200±500cfu
• Ventilation flow of negative pressure cabinet: ≥5m3/min
• Size of negative pressure cabinet: 755×400×990mm (W×D×H)
• Size of host: 1200×630×2100mm (W×D×H)
• Instrument noise: <65dB(A)
• Total Weight: About150kg
• Power supply: AC220V±10%, 50Hz
• Power consumption: <1500W