| 摘要 |
PROBLEM TO BE SOLVED: To easily detect the risk of an abnormality of CO gas generation by lowering a CO gas concentration determination value of a CO gas alarm, when detecting a specific gas appliance. SOLUTION: When detecting the specific gas appliance, a signal is output from an appliance discrimination means 11. When the signal is input, the CO gas concentration determination value of the CO gas alarm 7 is lowered, thereby facilitating furthermore detection of a gas leak. COPYRIGHT: (C)2009,JPO&INPIT
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