Automatic Pumps stop

[lukin1977]

I need to drain two rectangular shaped tanks (batchs Nº1 and Nº2). See schematic drawing attached
Volume of Batch Nº 1: 520 lts – Fluid: 15% Sulfuric Acid in water
Volume of Batch Nº 2: 215 lts – Fluid: Water contaminated with liquid from Batch Nº 1 dragged by a running wire between tanks

I will install 3 Anti-acid Magnetic Drive Pumps. 2 for Batch 1 and one for batch 2
I want the pumps to automatic stop when each batch is empty

I was thinking in some kind of sensor at the suction pipes that sense the absence of fluid inside the pipe and stop the pump

Pipe material: PVC
Suction Pipe size: 2”

Is there a sensor that will work for this?
Any suggestions?

 

[BrianE22]

Maybe a flow switch?

 

[OperaHouse]

Both these solutions would be fairly conductive. There are liquid level detectors that work on conductivity. Look for pump down. The upper electrode connection could be connected to just a switch to start. The lower contact would stop it.

 

[jraef]

Use a power monitor on the pumps and if the power drops, because there is no liquid, turn them off.


"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington

 

[itsmoked]

There are commercial "pump minders" often called "well minders" that will detect what jraef is suggesting and will stop pumps.

Keith Cress
kcress -

http://www.flaminsystems.com