FIG 3 (IMAGE) Compuscript Ltd Caption Fig. 3 (a) Concentration responses of dual-gas LITES sensor. (b) The linear relationship between 2f signal amplitude and concentration of CH4 and C2H2. Credit OES Usage Restrictions Credit must be given to the creator. License CC BY Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.