I have a pump to transfer water from tank A to tank B. Required control:
If tank A level is high, pump starts, level low pump stops.
If tank B level is high, pump stops to prevent water wastage, level low pump starts again

That is
Pump starts if (tank A high) and (tank B low)
Pump stops if (tank A low) or (tank B high)

What would be the most economical way to achieve this? The two tanks are rather far from each other. Pls give me advice. Thks alot!

 

Simply put a level switch in each tank (level switch is custom configured to fit your tank NPT and switch point). You would need a high and low level switch points.

The key to the system is a latching relay SSR1000. When one of the levels is activated - nothing will happen until the next level is reached. The fact that the latching relay is connected to level switches in different tanks doesn’t matter.

http://www.almegcontrols.com/latching_relay.htm

Thanks,
Bob Hogg

 

The most inexpensive way would probably be a hardwire system. Unless you have a plc in the area that you can add these to.

Mike McCowan
Automation Specialist
Industrial Automated Systems
[email protected]

 

The most economical way to do this would be hard-wiring the pumps with some level (float) switches, and a couple of relays. This is a fairly common practice.

JB