Device for measurement of discharged mouth gas to read off appropriate evaluation gases has indicator on surface similar to check card, whereby color change on indicator surface measure evaluated mouth gases

摘要

Gas measurement device has an indicator (2) on the surface similar to the check card surface (1). The color change on an indicator surface measures the evaluated mouth gases, whereby the color change of the indicator cannot be reversible. The color change of the indicator is compared with appropriate colors (3) on the surface.