Inhaled and/or exhaled air gas composition and/or flow velocity measurement device for examining breath function of human, has measuring tube and propagation unit provided between two ultrasonic transducers

摘要

The device has two ultrasonic transducers (30, 40), provided for radiation and detection of ultrasound. A measuring tube (14) and a propagation unit (15) are provided between the two ultrasonic transducers, where the propagation unit is provided in an inlined manner around an angle (16) in relation to the extending direction of the measuring tube. The ultrasonic transducers are intended as Piezo transducers or bending transducers such as silicon bending transducers. An independent claim is also included for a method for combined measurement of the velocity of flow and/or the gas composition of inhaled and/or exhaled air.