| 摘要 |
An ultrasonic flow rate measuring device according to the present invention improves a measuring accuracy. An ultrasonic flow rate measuring device includes an ultrasonic measuring portion in which a first ultrasonic transmitter-receiver and a second ultrasonic transmitter-receiver are provided to a measurement passage, and first to fifth partitioning plates are set substantially in parallel with an ultrasonic wave propagation path that connects the first ultrasonic transmitter-receiver and the second ultrasonic transmitter-receiver, whereby first to sixth flat passages are laminated/formed in the measurement passage by the partitioning plates. In this ultrasonic flow rate measuring device, the first ultrasonic transmitter-receiver and the second ultrasonic transmitter-receiver are arranged such that the ultrasonic measuring portion 20 measures the flow rate of the flat passage that is offset from the center along the lamination direction of the flat passages.
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