Pitot tube

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Pi·tot tube

(pē-tō'),
a stationary L-shaped tube inserted in a fluid stream, with its opening upstream, and used for measuring the velocity of fluid movement at that point in terms of the pressure developed in the tube by the fluid impinging on it, compared to a second tube opening laterally or downstream.

Pitot,

Henri, French engineer, 1695-1771.
Pitot tube - a stationary L-shaped tube inserted in a fluid stream and used for measuring the velocity of fluid movement.
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References in periodicals archive ?
Airlines around the world have begun replacing Pitot tubes on their aircraft.
The L-shaped metal Pitot tubes jut from the wing or fuselage of a plane, and are usually heated to prevent icing.
A malfunctioning Pitot tube could mislead computers controlling the plane to dangerously accelerate or decelerate.
An internal memo obtained by The Associated Press, written by the Alter Union which represents about 12 per cent of Air France pilots, calls on the pilots to refuse to fly A330s and A340s until at least two of the three Pitot sensors on the planes are replaced.
The same report says Air France decided to increase the inspection frequency for its A330 and A340 jets' Pitot tubes, but that it had been waiting for a recommendation from Airbus before installing new Pitots.
Investigators suspect the speed sensors, known as pitot tubes or probes, malfunctioned because of ice formation at high altitude.