The pressure of water flowing through a pipe is measured by the arrangement shown in Fig. P3–141. For the values given, calculate the pressure in the pipe.
The specific gravity of the gauge fluid is given as, 2.4.
Hence the density of the gauge fluid is, .
The gauge pressure is 30 kPa.
Density of water is .
As we go down starting from gauge pressure, the pressure we will add with the gauge pressure and vice versa for going up. This is our convention and can also be done by the other way around.