Instrument selection
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A small device is needed to measure the cumulative flow rate of three media: tap water, nitrogen, and water vapor. It is inexpensive, does not require a power supply, and offers remote transmission capabilities. That expert could provide some guidance.
To do it more accurately, there are two methods: first separate the phases and then measure them, and finally combine them again； Multiphase flow meter. It depends on your choice. Measuring a mixed phase cannot be achieved with a single flow meter.
There are very few instruments that do not require electricity; accumulation is also necessary. Turbine flowmeters can be used, but they are not very suitable for measuring these three types of media. I hope everyone can improve their understanding in this regard.
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So far, there are no flowmeters that can measure the flow of three-phase mixtures simultaneously; measurement is possible only after separation first
It wasn’t clearly stated earlier that one instrument is needed for each medium! :)
There are gas-liquid two-phase flow meters, but they aren’t cheap either
Check online to see if the accuracy of water meters and gas meters is sufficient
In my opinion, without considering pressure drop, a rotameter with an internal battery can be used.
Everyone here is an expert; thank you!
Accuracy is not required! It seems there aren’t many DN50 water supply pipes available on the market