| 摘要 |
PROBLEM TO BE SOLVED: To provide a measuring device for optical concentration measurement through reaction with a reagent of a detection material, which prevents reduction in sensitivity of the detection material.SOLUTION: A device for measuring concentration of a detection object gas includes a detection material 3 impregnated with a reaction reagent to form a reaction mark through reaction with the detection object gas, which is irradiated with light from light emitting means 4 so that the optical density of the reaction mark is detected based on the light reflected from the reaction mark of the detection material 3. The light emitting means 4 is intermittently driven at predetermined intervals. |
