Review on 💪 Powerful Pinpoint PH Controller Interface – 120VAC for Precise pH Control by David Plunkett

contains everything you need to monitor, calibrate and control two circuits to keep the pH of solutions within an acceptable range. I have used this with 2x 12v metering pumps connected to 2x 1a 12v power supplies connected to the unit. with a little optimization and dilution of the solution, it works great. Place the probe near the solutions outlet to allow the system to microdose for best results