Table 2.
The response and recovery times of the gas sensors to ethanol, benzene and hydrogen.
Gas | Temperature (°C) | Response Time (s) | Recovery Time (s) | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
S(c) | S(m) | S(c/m1) | S(c/m2) | S(c/m3) | S(c) | S(m) | S(c/m1) | S(c/m2) | S(c/m3) | ||
Ethanol | 200 | - | - | 286 | 496 | 549 | - | - | 292 | 519 | >600 |
250 | - | - | 252 | 277 | 180 | - | - | 281 | 355 | 349 | |
300 | 126 | 19 | 197 | 106 | 87 | 14 | 90 | 178 | 182 | 142 | |
350 | 115 | 41 | 127 | 289 | 430 | 26 | 271 | 246 | 235 | 226 | |
400 | 54 | 56 | 152 | 210 | 295 | 37 | 201 | 467 | 467 | 462 | |
Benzene | 200 | - | - | >600 | >600 | >600 | - | - | >600 | >600 | >600 |
250 | - | - | 360 | 486 | >600 | - | - | 60 | 158 | >600 | |
300 | - | - | 110 | 225 | 403 | - | - | 14 | 12 | 13 | |
350 | - | - | 411 | 422 | 478 | - | - | 89 | 63 | 78 | |
400 | - | - | 173 | 218 | 293 | - | - | 207 | 103 | 115 | |
Hydrogen | 200 | - | - | 344 | 343 | 349 | - | - | 84 | 216 | 233 |
250 | - | - | 261 | 162 | 146 | - | - | 387 | 406 | 404 | |
300 | 83 | 131 | 96 | 82 | 87 | 194 | >600 | 423 | 451 | 442 | |
350 | 80 | 144 | 87 | 110 | 121 | 165 | >600 | 568 | >600 | >600 | |
400 | 89 | 34 | 74 | 105 | 110 | 139 | >600 | 507 | 519 | 520 |