Spirometer Bacterial/Viral Filter 2820 Series BVF™

Protects the subject against cross-infection

Protects the spirometer against cross-contamination

99.99% Cross-contamination efficiency

Very low expiratory flow impedance

Low effective dead space of 65 mL as required for lung volume and DLCO testing

Comfortable mouthpiece

Efficient at high flow rates

99.99% at 55 and 750 L/min Efficiency

0.7 to 1 µm Validation using Bacillus Subtilize var niger mean diameter

0.08 kPa/L/s (0.8 cmH2O) resistance to airflow at 750 L/min (BVF alone)

0.12 kPa/L/s (1.2 cmH2O) Resistance to airflow at 750 L/min (BVF + Fleisch)