Device for measuring the flow velocity and/or molecular mass of gases ou gasmixtures

摘要

The invention relates to a device for measuring the flow velocity and / or the molar mass of gases or gas mixtures in medical applications by means of ultrasound propagation time measurement with a measuring tube (9) and two in this deployable ultrasonic transducers (3a, 3b) separated by membranes from Meßrohrinnenraum are. According to the invention, the membranes are gas-tight executed and inserted into the measuring tube, that this forms a gas-tight pipe connection. The separated again connected with the measuring tube ultrasonic transducer contact the membrane flush.