Deep-cold brine flow measurement
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A friend asked whether it is possible to use an electromagnetic flowmeter to measure deeply cold saline at temperatures of minus twenty degrees or lower I’m dizzy! It’s really hard to answer this question. From what I remember in some selection examples, electromagnetic flowmeters can only measure fluids with temperatures ranging from minus 20 degrees to around 100 degrees; they cannot function at temperatures below minus 20 degrees. I wonder if that marine friend has experience in measuring the flow rate of cryogenic brine streams at minus twenty degrees Celsius or lower.
Non-contact flow meters can be used; it’s not necessary to use electromagnetic ones
I considered using external adhesives, but I didn’t go with that option due to concerns about insulating the outer wall of the cryogenic water pipe and the potential for freezing, which could affect the measurements
The PTFE lining can be used in the range of -40 to 180 degrees℃
Electromagnetic flowmeters can be used, but it’s important to ensure that the meter’s display is insulated after installation, to prevent condensation water from getting inside
-At 20°C, higher requirements are placed on the sealing of flow meters; it is advisable to choose models with a high protection rating, such as IP67 or even IP68. By opting for a split-type design, there is no need to worry about condensation water entering the converter.
An electromagnetic flowmeter is a better choice for cryogenic brine. At a temperature of -20 degrees, conventional electromagnetic flowmeters should be able to handle it; a split-type flowmeter would be better, as the meter head will not be affected by the low-temperature pipelines.
At -20 degrees, conventional split-type electromagnetic flowmeters can handle the situation, but I’m not sure whether they will work at -25 degrees.
I checked the information on Yokogawa’s electromagnetic flowmeters; those with a PFA lining can handle medium temperatures as low as -40 degrees. What’s wrong with that? Why not go and look up information from a few manufacturers of electromagnetic flowmeters?
Polytetrafluoroethylene material can be used for vortex flowmeters.
For electromagnetic flowmeters, just choose the right options for measurement – that’s all that’s needed