Flow meters used for acidic, non-conductive substances such as acetic acid and chlorophenol
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As the title suggests, I am currently looking for a flow meter suitable for measuring corrosive substances such as acetic acid or chlorophenol, which are non-conductive. Currently, I am considering using a positive-displacement flow meter made of ceramic and graphite materials. I wonder if there are any better, more accurate flowmeters suitable for substances that corrode stainless steel and are not conductive.
It’s easier if the pressure and temperature are lower; otherwise, it’s very difficult.
Balance flow meter, mass flow meter. Vortex flow meters and the like should all work fine; it’s just necessary to have a PTFE lining
For media that are both corrosive and non-conductive, a suitable flow meter must be selected based on specific parameters and process requirements. Acetic acid is conductive, so an electromagnetic flowmeter can be used. For chlorophenol, Hastelloy Coriolis mass flow meters, PTFE-lined metal rotor flow meters, ceramic electromagnetic flow meters, etc., can be used.
Upstairs, the metal rotor flowmeter does not have high enough precision; should a ceramic electromagnetic flowmeter be used instead? Was it written wrong? Mass flow meters are too expensive. Our materials are at atmospheric pressure, with a temperature of around 60-80 degrees Celsius. Let’s see if there’s anything suitable
The ceramic flow meter mentioned on the fourth floor is likely a capacitive electromagnetic flow meter with an alumina ceramic lining.
You need to upload the process parameters in order to determine which type of flow meter to choose; otherwise, there are too many options available.
It is generally no problem to measure these media using a capacitive electromagnetic flowmeter. Capacitive electromagnetic flowmeters feature a liquid-contact-free electrode design with a ceramic lining, and can handle minimum conductivities of around 0.1 uS/cm. This type of flow meter is the best choice. It can be seen that the original poster doesn’t know much about electromagnetic flowmeters, especially having almost no knowledge of this particular type of electromagnetic flowmeter.
A mass flow meter will do! The mass flow meter is what we use here to measure acetic acid flow! The measurement tube is made of titanium! The mass flow meter for acetic acid here uses a single straight tube for measurement!
As mentioned on the 8th floor, I too have only started to get involved with instruments recently. Capacitive electromagnetic flowmeter? I’ll do some research. But if the measured conductivity is still less than 0.1 us/cm. What should be done? Our conductivity is around 0.07.
In a situation like the one described by the poster, there’s no need to be too picky. If high precision is required, use a mass flow meter; if the cost of a mass flow meter seems too high, then use a metal tube float flow meter. As for precision, choosing a product with excellent technical specifications will enable achievement of a precision level of 1.0.