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A pitot tube is a flow measurement device that is commonly used in the aeronautical and engineering fields to measure the speed, or velocity, of fluid in a pipeline or conduit, such as air or water. The device was first developed in the 1700s by French engineer Henri Pitot, hence the name pitot tube. The pitot tube consists of a small, open tube that is inserted into a moving fluid (such as air) perpendicular to the flow direction. The tube has a nose, called the pitot head , that is positioned facing into the flow. When the fluid flows past the pitot head, it creates a pressure difference between the pitot head and the outer surface of the tube. This pressure difference is called the dynamic pressure and is directly proportional to the velocity of the fluid. Pitot Tube Diagram The pitot tube also has a second tube that is parallel to the first tube but has small holes, called static pressure ports, along its sides. This second tube measures the static pressure of the fluid, which...