Discussion on the selection of flow meters for high-viscosity materials

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First of all, this post is for discussion – it’s not an advertisement nor is it meant to solicit advertisements; it’s a technical discussion. Forums are meant to provide a free space for such discussions. There’s no need to start by mentioning that one has a flow meter and then end the conversation there. Although there are various approaches to using flow meters, I think many people are willing to share their knowledge to some extent, after all, knowledge knows no borders. I’ve used some simple flow meters, such as turbine and vortex type ones; their principles are relatively straightforward, making them suitable for measurement. But this works only for water or liquids with low viscosity. For liquids with high viscosity, such as those with viscosities of 2000 cps, 5000 cps, or even higher, it becomes more difficult to measure the flow rate. There are methods suggested for reducing viscosity by heating the material, but some materials aren’t sensitive to temperature. Do anyone have any experience dealing with such highly viscous materials? My experience with flowmeters is limited, so I’m posting this to welcome discussions