| 摘要 |
PROBLEM TO BE SOLVED: To indicate electric power consumption at the time of use in a house, such as homes and offices. SOLUTION: A coil type current sensor 12 which detects alternating current flowing in an electrical wire is provided. An A/D converter 13 which converts an alternating current detected by the coil type current sensor 12 into a digital signal is provided. A radio transmitter 14 for transmitting the digital signal is provided. A radio receiver 15 receiving the digital is provided. A D/A converter 16 for converting the digital signal received to an analog signal is provided. An indicator 18 for indicating the analog signal is provided.
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