| 摘要 |
PROBLEM TO BE SOLVED: To provide an alarm device capable of easily setting this alarm device, and accurately transmitting a signal. SOLUTION: An alarm device 1 is constituted of a hemi-sphere sensor 2 for detecting the change in the temperature, a transmitter 3 connected with the sensor 2 for transmitting a signal by radio to a specific receiver, and a charger 4 connected with the transmitter 3. A storage battery for supplying electricity to the sensor 2 and the transmitter 3 is incorporated in the charger 4. Also, an electric cord having a plug is connected with the charger 4 so that when the plug is put in a socket, electricity can be supplied to the sensor 2 and the transmitter 3, and simultaneously the battery can be charged.
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