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Non-conductive corrosive liquid metering flowmeter selection description

Non-conductive corrosive liquid metering flowmeter selection. The clamped ultrasonic flowmeter is not suitable for direct contact with the instrument when it is in operation, so it is suitable for various corrosive fluids.
Clip-on ultrasonic flowmeters are classified according to their principles. The time difference method is suitable for clean single-phase fluids. The accuracy is related to the pipe diameter and flow rate, such as Panametics' AT series instruments.
a. When the diameter is >150mm, v>0.3m/s, the inaccuracy is ±2%R (calibrated up to ±1%R); sand ≤0. 3m/s, the uncertainty is ±0.Olm/ s.
b. 05mls。 When the pipe diameter ≤ 150mm, v> 0.3mls, the uncertainty is 5%; v ≤ 0. 3mls, the uncertainty is 0. 05mls.
The Doppler flowmeter is suitable for liquids with a high solid content or containing bubbles. The uncertainty can only reach ±1%~±10%, which is obviously much lower than the electromagnetic flowmeter, so it is only better than nothing else. Only when the approach is adopted. The price is independent of the pipe diameter. When DN≤200, the ultrasonic instrument is more expensive than the electromagnetic flowmeter, and when the DN≥250, the ultrasonic flowmeter is cheaper than the electromagnetic flowmeter.

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