When the medium flows in the measuring tube, the kinetic energy of its own 
 Through Baffles (target) pressure generated from time to time, and Baffles have a role 
 Force, the force's size and flow rate proportional to the square. 
 Baffles (target) to accept the force F, is passed through the rigid connection of the pieces (measuring rods) spread capacitive force sensor, capacitive force sensor produces a voltage signal output.