The Flow Meter Demonstration, "FME18", designed by EDIBON, allows through 3 different flow measurement accessories: Venturi tube, orifice plate and a variable area meter installed in series in the unit, the study to find the flow rate of the fluid flowing through each one of them comparing them directly. Several pressure taps are connected to a panel of eight tubes. The flow control valve allows the variation of the flow rate through the circuit, and its adjustment, along with the bench control valve, allows for varying the system static pressure. The pressure taps of the circuit are connected to an eight-bank manometer, which incorporates an air inlet valve at the top manifold which facilitates the connection to the hand pump. This enables to adjust the levels in the manometer bank to a convenient level to suit the system static pressure.