Therefore, as long as it has a short straight section (5 to 10 times the pipe diameter), it can obtain a stable reading.
Because ultrasonic flowmeters and electromagnetic flowmeters are velocity flowmeters, it is obvious that a straight pipe segment is short and the disturbance is large. The flowmeter measures whether or not the flow velocity represents the average flow velocity and needs empirical values ​​to correct.
Therefore, when designing a pump room or digging a well, it is still necessary to consider a straight pipe section at the installation point of the pump room or valve after the valve.
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