to measure the submersible ...
Published by ِِِA.M Eldabaa, Mech Eng at Hydraulics research inistiute
to measure the submersible pump speed, just in order to be sure that the pump running with the guaranteed speed you can measure the impeller speed from the suction side (this tip you can do it before the factory test and before you put the pump in the water) i did this test before in our lap to be sure that the pump rotating with its guaranteed speed.