Abstract
Gas sensors based on hybrid suspended gate field effect devices are used for the detection of specific gases occurring in test fires. This sensor type can be operated with a power consumption < 1 mW and is therefore best suited for the use in fire detectors. Different floating gate FET (FGFET) sensors designed for the detection of CO, CO 2 and NO 2 were tested in standard test fires regarding EN54. Significant sensor signals were obtained for all test fires enabling a reliable and fast detection of fires. In addition, a separation of fire types is possible by signal evaluation combining signals of different sensors.
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