For a liquid flow rate of DN25 and 60L/H, which flow meter is more accurate?
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As the title indicates, it is a sodium hypochlorite solution; the installation method can be chosen. The flow meter installed previously showed significant fluctuations when the flow rate was between 15–30 L/h, with the measured values fluctuating within a range of ±10 L/h. When the flow rate exceeded 40 L/h, there were no significant fluctuations in the measurement values. The maximum flow rate for this pipeline is 60 L/h. Which type of flow meter do you experts recommend, one that provides accurate readings, stable measurements, on-site display, and remote transmission capabilities?
Is an injection used with such a small diameter tube? Note: Does sodium hypochlorite adjust water pH? Well, it must be a mass flow meter; there’s nothing much to say about that
Rotary flow meter, specifically designed for low flow rates
The mass flow rate range is KG/H. Moreover, the density of the sodium hypochlorite medium isn’t constant, which poses difficulties. How can I transmit the 4-20mA signal and convert it to L/H? Even if it’s possible to do so, it’s likely to be unstable, right, teacher? Quality is more relevant in the oil industry, where they measure weight in kilograms quite often.
A mass flow meter of the Coriolis type is used to measure mass flow rate; it has nothing to do with density. Even if the density changes, the measurements will still be accurate. The calculation of mass flow rate isn’t done by multiplying density by volume flow rate. Moreover, a mass flow meter can output multiple signals – either density or mass flow rate. Unit conversion can be achieved through configuration. If you need the value in L/H, that represents volume flow rate. Since your density is changing, what’s the use of volume flow rate? For calculations, mass flow rate is definitely what’s needed. I’m not sure whether sodium hypochlorite is volatile or not; if there’s a risk of the liquid not filling the pipe fully or if gases are present, then accurate measurements may not be possible. Please tell me first where you plan to use this device
Using a dual-frequency electromagnetic flowmeter directly provides high accuracy, strong resistance to interference, corrosion resistance, and no pressure loss. For measuring sodium hypochlorite solutions, no other flow meter is as good as an electromagnetic flow meter.
Since it is about measuring volumetric flow rate and the density is not constant, this indicates that the control is not very precise. Using electromagnetic or differential pressure methods works well; when precision is required due to variable density, a mass flow meter is the better choice
I think with such a small diameter, a rotor type could be considered; an electromagnetic flowmeter would work as well.
If a flow meter is to be chosen, a mass flow meter is undoubtedly the best option for high precision; however, it requires a change in diameter and its precision is slightly lower. An velocity-type flow meter can be used as an alternative, with a smaller diameter required. For applications where high precision is not necessary, a rotameter can be chosen