Device for measuring concentration of carbon dioxide in breathing air, in e.g. respirating system that is utilized for artificial respiration of patient in medical application, has aperture provided with chamber for leading gas sample

摘要

The device has a temperature sensor (15) for determining temperature of a heating element (12) such that heat conductivity of a gas sample is determined from difference in temperature between the heating element and the temperature sensor. The heating element and the temperature sensor are arranged in a measuring chamber, where an aperture is provided with the measuring chamber for leading the gas sample. The aperture is closed with a hydrophobic membrane, a flow barrier or a moistening or a heat accumulator layer. An independent claim is also included for a method for measuring concentration of carbon dioxide in breathing air in respirating and anesthesia systems.