前言 为保证安全用水,合理用水,实行成本核算,常要求对水厂的进水量、出水量进行正确的计量。虽然传统的计量仪表种类较多,但都不能很好地满足水厂的要求。超声波流量计,由于其传感器可安装在被测管道的外壁上对流体进行无接触测量,以及不会产生水头损失,因而最适合于水厂中用 Preface In order to ensure the safe use of water, rational use of water, the implementation of cost accounting, often require the right amount of water into the water plant, the amount of water for the right measurement. Although there are many kinds of traditional measuring instruments, they can not meet the requirements of waterworks well. Ultrasonic flowmeter, because of its sensor can be installed on the outer wall of the pipe to be measured on the fluid contactless measurement, and will not have head loss, which is most suitable for use in water plants