Response (Res.) and recovery (Rec.) time of different sensors.

Conc., ppm	250 °C		300 °C		350 °C		400 °C
	Res. time, s	Rec. time, s	Res. time, s	Rec. time, s	Res. time, s	Rec. time, s	Res. time, s	Rec. time, s
Sample 500 °C
2.5	218	304	81	185	50	129	8	140
5	215	364	112	148	46	161	9	154
10	239	647	72	210	67	217	6	165
25	231	405	66	174	25	247	6	210
50	296	1078	53	324	11	>200	4	242
Sample 600 °C
2.5	398	542	152	247	48	208	19	159
5	414	341	131	210	34	167	10	181
10	322	265	93	175	16	149	7	205
25	212	233	43	209	11	142	11	262
50	166	313	64	207	5	166	6	329
Sample 700 °C
2.5	423	269	164	261	149	300	30	182
5	421	241	145	259	117	242	15	218
10	401	256	172	197	123	144	8	196
25	374	441	141	223	94	117	7	191
50	393	361	135	251	73	197	6	161