Table 1.

Information regarding the real signal waveforms with the mean sensor resistance.

Input Condition	Ethanol Concentration [ppm]	Figure 5a		Figure 6a
		Measurement Time [s]	Mean Sensor Resistance [kΩ]	Measurement Time [s]	Mean Sensor Resistance [kΩ]
Ethanol	50	0~360	166.06~26.93	0~950	60.82~12.83
Air	0	360~720	26.93~154.47	950~1900	12.83~50.98
Replacing Sensor	0	720~900	X	1900~2080	X
Ethanol	50	900~1260	62.46~19.43	2080~3030	74.18~15.35
Air	0	1260~1620	19.43~70.39	3030~3980	15.35~77.57
Replacing Sensor	0	1620~1800	X	3980~4160	X
Ethanol	50	1800~2160	77.41~20.49	4160~5110	102.87~17.17
Air	0	2160~2520	20.49~79.77	5110~6060	17.17~100.62
Replacing Sensor	0	2520~2700	X	6060~6260	X
Ethanol	50	2700~3060	104.68~23.6	6260~7210	62.25~13.26
Air	0	3060~3600	23.6~127.74	7210~8200	13.26~58.97