| 摘要 |
PROBLEM TO BE SOLVED: To provide an alarm unit capable of reducing interlocking operation of an external device when there is no problem of safety by notifying start of transmission such that abnormality is detected in the external device.SOLUTION: A CPU 36a detects gas leakage based on a concentration signal from a gas sensor 31. When detecting gas leakage, the CPU 36a outputs voice such as "Is gas leaking?" from a speaker 33. When a gas leakage detection state continues for a constant time or more, the CPU 36a not only outputs a gas meter disconnection signal but also makes the speaker 33 output voice such as "Is gas leaking?" and "A disconnection signal is being output to a gas meter." |
