Ultrasonic flowmeter:
It is an instrument based on the principle of "velocity difference method" to measure the liquid flow in the pipe. It adopts advanced multi pulse technology, digital signal processing technology and error correction technology, so that the flow meter can adapt to the environment of industrial site more easily, economically and accurately. According to the principle of signal detection, ultrasonic flowmeter can be divided into propagation velocity difference method, beam offset method, Doppler method, cross correlation method, spatial filtering method and noise method. As the same as the electromagnetic flowmeter, the ultrasonic flowmeter is an unimpeded flowmeter because the instrument flow channel is not equipped with any blocking parts. It is a type of flowmeter that is suitable for solving the problem of difficult flow measurement, especially in large diameter flow measurement. It is one of the rapidly developing types of flowmeters.