To effectively read and interrupt reading of a meter in the case of interrupting a telephone channel caused by moving.
A gas metering unit 2 integrates gas flow rates detected by a gas flow detector 1 and holds a metered value. A controller 3 compares a present day and time of measuring by a timer 5 with a metering day and time held by a metered day and time holder, and generates a metering command when both coincide. The metered value held by the unit 2 is transmitted to a communicating unit 6. The transmitted metered value is held as a transmitted metered value. When a difference of the metered values of the transmitted value and the metering unit coincides with an additional gas amount held by an additional gas amount holder 32, a shut-off command is generated. The present day and time measured by the timer 5 is compare with the shut-off day and time held by the shut-off day and time holder. When the both coincide, a shut-off command is generated, and a gas shut-off valve 9 is closed by either shut-off command, and opening of the plug of the valve 9 is inhibited.
SHIRASAWA TADANORI
OTANI TAKAHISA
YOSHIDA MIHO
