A probing film that absorbs and reacts with gases with different wavelengths of light for high gas sensitivity

摘要

A light source 120 and a target gas comprising the composition of the paper tape 110 or a target gas from the group of target gases such that the light 112 emitted from the light source 120 can be reflected from the paper tape 110. [ , And systems are disclosed herein. The light 112 may emit at least three wavelengths selected from red, green, blue, and ultraviolet wavelengths, and pattern recognition may be used to identify and / or distinguish the target gas, or the disturbing gas from the group of target gases .