Differential U-tube Manometer

Figure 2.12 : Differential U-tube manometer

 

Differential U-tube manometer (Fig. 2.12) is very handy to measure the pressure difference directly and is basically similar to the U-tube manometer discussed above. What was the open end before is now connected to a different pressure, $p_B$ so that we measure the difference $p_A-p_B$. Now we have,

so that

(c) Aerospace, Mechanical & Mechatronic Engg. 2005
University of Sydney