| 摘要 |
PROBLEM TO BE SOLVED: To provide an ultrasonic flowmeter which can reduce product-to-product variations in performance. SOLUTION: A pair of ultrasonic sensors 32, 32 are held by a sensor-holding piece 37 integrally-molded with a measuring tube 31 (a plurality of measuring tube structures 40, 40), thereby reducing the variations in the distance between the ultrasonic sensors 32, 32 and the measuring tube 31 and the distance between the ultrasonic sensors 32, 32 as compared to conventional types, and hence reducing the product-to-product variations in performance (more specifically, measurement precision) in the ultrasonic flowmeter 10 as compared to conventional ones. Since the measuring tube 31 is configured by the two measuring tube structures 40, 40 which are vertically divided parallel to its axial direction, flexibility in the shape of an internal area (a flow channel 31a) of the measuring tube 31 are enhanced, by allowing, for example, a constriction part 35 to be formed at the opening edge of the measuring tube 31. COPYRIGHT: (C)2007,JPO&INPIT
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