▎ 摘　　要

NOVELTY - The system has an attenuated total reflection prism (3) arranged on a metal film (2) and covered with a graphene thin film (1). USE - Gas molecule detecting system. ADVANTAGE - The system is simple to operate, and improves detection reliability and sensitivity of gas molecules. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for detecting concrete permeability. DESCRIPTION OF DRAWING(S) - The drawing shows a side view of a gas molecule detecting system. Graphene thin film (1) Metal film (2) Attenuated total reflection prism (3)