What methods can be used for measurement?
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Control of the boundary position of the tank’s water separation unit: Medium: oily wastewater; distance between measurement points: 500 mm; operating pressure: atmospheric pressure; operating temperature: 58°C. Density of the medium: 830 kg/cm3 and 998 kg/cm3. Differential pressure transmitters are currently used for measurement, with a migration value of 490 Pa; the measurement range is from -490 to 330 Pa. The issue is that the accuracy of differential pressure transmitters with diaphragms and capillaries is 0.2, which is somewhat insufficient. Are there any other methods of measurement?
Double flanges are an option, but proper calculations are required; other options include magnetostrictive or float level gauges.
A servo-level gauge can also be used!
A single-flange level gauge can be used for measurement. It is best not to use magnetostrictive or float level gauges. Because oily wastewater is sticky, scale forms after being used for a certain period of time.
A radar level gauge can be used; it is contactless and unaffected by factors such as the viscosity, turbidity, or corrosiveness of the medium. The accuracy is also fine.
A static pressure level gauge is also a good option; if the medium being measured contains no sedimentary impurities, a differential pressure transmitter can be used as well. I wonder if you are considering insufficient precision or inaccurate measurement? ? ?
Ultrasonic or radar-based interface detection is the best
For measuring the level of oily wastewater, our plant uses float-type level transmitters, which deliver very good results
Hehe, it depends on how much the original poster is willing to spend; use floating buoys, but the cost is too high.
Our company uses differential pressure transmitters, and they work well; we have also used float-type transmitters. You might want to give internal float level transmitters a try as well.