1. Use the ultrasonic flow sensor, accurate & reliable, excellent curve repeatability, 2. Modular design to achieve different PFT function. 3. High sensitivity and low resistance ultrasonic flow transducer, accurate & reliable, excellent curve repeatability. 4. RECO for the disposables, Perfectly eliminate cross-infection. 5. Automatic zero offset calibration. 6. Real-time BTPS correction. Functions: *Slow Ventilation Capacity *Flow Volume Loop *Tidal Breath Volume Loop *Maximal Voluntary Ventilation *Bronchial Provocation Test
