Volumetric Flow Meters:

• Electromagnetic Flow Meters: Measure the velocity of conductive liquids using Faraday's law of induction. 

• Ultrasonic Flow Meters: Use sound waves (ultrasound) to measure fluid velocity and calculate volumetric flow. 

• Vortex Flow Meters: Detect the formation of vortices in the flow to determine flow rate. 

• Turbine Flow Meters: Measure flow rate by the rotation of a turbine blade driven by the fluid. 

• Differential Pressure (DP) Flow Meters: Measure the pressure difference across a flow restriction (like an orifice plate) to determine flow rate. 

Mass Flow Meters:

• Coriolis Flow Meters: Measure mass flow by detecting the Coriolis effect on a vibrating tube. 

• Thermal Mass Flow Meters: Measure mass flow by detecting changes in temperature of a heated element in the flow