Respirometer can be used for investigating tidal volumes, respiratory rate, pulmonary ventilation, reserve volumes and vital capacity, Three-Ball Vital Capacity, Washable.
The device consists of a base and a central part. The central part is divided into 3 small rooms with 3 floating balls, each of which has a different color (each small room represents the suction value per second: 600, 900 and 1200 cc) . It has an easy-to-grip handle.