Answer / Suneel Kumar Sahu

1. Vortex Flow Meter: A non-intrusive device that measures fluid flow rate by sensing the pressure variations caused by vortices formed in the fluid as it passes through a constriction. Used for liquids and gases, especially where the physical properties of the fluid are constant or can be accurately measured.
2. Mass Flow Meter: A device that directly measures the mass flow rate of a fluid, typically used in applications requiring precise control over fluid flow, such as gas cylinders and liquid dosing systems.
3. Electromagnetic Flow Meter: A non-intrusive device that measures the velocity of a conductive fluid by creating a magnetic field across the pipe and sensing the resulting electromotive force generated by the moving fluid. Used for liquids and slurries, especially where high accuracy is required.

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