| 摘要 |
PROBLEM TO BE SOLVED: To provide an ultrasonic gas meter capable of determining dew condensation while saving costs, and to provide a dew condensation decision method of the gas meter.SOLUTION: The ultrasonic gas meter 40 includes: transducers TD1 and TD2 intermittently transmitting an ultrasonic signal into a gas passage and receiving an ultrasonic signal; an amplifier 43a amplifying the signal received by the transducers TD1 and TD2 to predetermined intensity; and a CPU 14a for determining the generation of the dew condensation in a meter passage, when an amplification degree provided by the amplifier 43a is monitored for every predetermined time, and the monitored amplification degree changes from an initial value by a predetermined value or more. |
