I am looking for a dosing pump that monitors flow-rate of the water it is pumping additive into and adjusts dose rate to ensure a constant concentration of additive. Needs to be 12v DC.
I have an Arduino project in mind to achieve the same thing. But it would be simpler if an off the shelf solution was available for a reasonable price.
Application is addition of detergent to water at a constant concentration. The flow rate of the water will be variable.