Aerofoil for Air Flow Measurement is specially designed for flow measurement in square / rectangular duct. This is particularly useful for duct, since the other flow elements like orifice, flow nozzle, etc. cannot be used for duct flow measurement. This consists of aerodynamic shaped foils, which offers a very little resistance to the fluid. The typical profile of Aerofoil, offers a smooth passage to the fluid which leads to the lesser pressure drop and thus more efficiency. Aerofoil is supplied with flanged end, thus making the installation in the line, very easy.