| 摘要 |
PCT No. PCT/FR93/00534 Sec. 371 Date Jan. 28, 1994 Sec. 102(e) Date Jan. 28, 1994 PCT Filed Jun. 4, 1993 PCT Pub. No. WO93/24827 PCT Pub. Date Dec. 9, 1993A device for selective detection of gas, enabling a first gas to be detected relative to a second gas, the device having a solid state sensor provided with an insulating substrate having a first face and a second face, a heater element deposited on the first face of said substrate, metal electrodes deposited on the second face of said substrate, and a semiconductor layer formed on said electrode and over the second face of said substrate. Detection is performed by simultaneously determining a voltage U representative of the resistance of the semiconductor element of the solid state sensor and the voltage difference S between a voltage representative of the temperature of the heater element of said solid state sensor and a voltage representative of the temperature of a heater element of a reference sensor, the voltage U and the voltage difference S each being compared with a different and predetermined threshold voltage in order to enable selective detection of gas.
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