Hi. I think the pump in the ...
Published by alireza Reyhan, Eng
Hi. I think the pump in the domain of the hill should be checked first if there is one. maybe the efficiency or calculation has some issues. Then you may use a mechanical flow switch to signal the ultrasonic meter to work otherwise signal low flow/pressure to the control system to be checked or start a pump.
flow switch picture:
or you can use multiple elbows to make the flow efficiency better. Check the attached PDF. If you need more help please contact me on:
Good luck