1.  pitot tube(n = noun.artifact) pitot - measuring instrument consisting of a right-angled tube with an open end that is directed in opposition to the flow of a fluid and used to measure the velocity of fluid flow;
is a kind of measuring device, measuring instrument, measuring system

2.  pitot tube(n = noun.artifact) pitot head, pitot-static tube - measuring instrument consisting of a combined Pitot tube and static tube that measures total and static pressure; used in aircraft to measure airspeed;
is a kind of measuring device, measuring instrument, measuring system

pitot tube, n. a device consisting of an open-ended right-angled tube used to measure the speed or flow of a fluid.

Etymology:
H. Pitot, Fr. physicist d. 1771

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