ULTRASONIC FLOWMETER

To provide an ultrasonic flowmeter with which it is possible to easily perform flowmeter installation work and calculate a flow rate with high accuracy.SOLUTION: A plurality of measurement units 1 having a measurement path 13 which a fluid flowing in a piping passes through, an upstream-side first ultrasonic sensor 11 for generating a first ultrasonic wave riding on the flow of the fluid passing through the measurement path 13, a downstream-side second ultrasonic sensor 12 for generating a second ultrasonic wave against the flow of the fluid passing through the measurement path 13, and a reflection plane 14 for reflecting the first ultrasonic wave and sending it to the second ultrasonic sensor 12 and reflecting the second ultrasonic wave and sending it to the first ultrasonic sensor 11 is connected in serial form to constitute a rod-like insert 8, the rod-like insert 8 being inserted into the piping along the radial direction of the piping via a ferrule fastened to the piping.SELECTED DRAWING: Figure 6 【課題】本発明は、流量計設置作業を容易に行え、しかも、流量を高精度に算出可能な超音波流量計を提供する。【解決手段】配管内を流れる流体が通過する測定路13と、その測定路13を通過する流体の流れに乗った第１超音波を発信する上流位置の第１超音波センサ11と、測定路13を通過する流体の流れに逆らった第２超音波を発信する下流位置の第２超音波センサ12と、第１超音波を反射して第２超音波センサ12へ送ると共に上記第２超音波を反射して第１超音波センサ11へ送る反射面14と、を有する測定ユニット１を、直列状に複数個連結して棒状挿入体８を構成し、棒状挿入体８は、配管に固着された分水栓を介して、配管のラジアル方向に沿って配管内に差込まれるように構成した。【選択図】図６