School of Physics Lecture Demonstration Manual

Fc-7 The Pitot tube

Published: Monday 13 March 2006 - Updated: Tuesday 29 March 2011


To Demonstrate how airflow can affect fluid levels in a manometer.



Click on pictures to enlarge.

The Pitot Tube

Pitot Tube Diagram


The Pitot Tube


The apparatus consists of two tubes, one surrounded by another in which there is a number of holes. Thus one tube has its aperture directed upstream and the other directed across the stream. Each tube is connected to an arm of the manometer. The pressure difference in the tube is given by the difference h in the level of the liquid and the velocity of the fluid stream is given by

v= sqr rt. (2 g h)

Safety notes

Electrical safety 

Sharps Safety 


top of page