Milwaukee Instruments MC122US pH Controller with Hi/Low Range Alarm, 2 Point Manual Calibration, 0.0 to 14.0 pH Range

This is a must have for my aquarium CO2 setup. Literally shuts off my CO2 solenoid once the PH reading on my Milwaukee controller hits 6.9. Easy setup and calibration. Maybe I am using it wrong, but I do wish the suction cup ring that hold the wand in place was more able to keep the wand in the desired position which I like the vertical position. Great product over all and I highly recommend it!!!

Litem fonctionne bien mais demande une certaine connaissance pour bien l’installer et le calibrer. La lecture du PH est facile et le déclencheur de CO2 est très précis.

The PH Controller works best and I am very satisfied with the performance, but the included AC/DC adaptor after checking with my multi tester gives an output of 19.78volts which is over than the required voltage of the main unit, instead of 12volts only. Amazon help center assist me to solve the issue.I am happy with performance of this product and it makes my life easy and no worries while I'm away.I also suggest that the included AC/DC adaptor should be auto volt since this product is sold internationally, considering the output voltage is 12volts only to prevent sure damage to the main unit.

Probe arrived completely dry. I was able to soak it in probe storage solution, and it appears fine, but the probe holder was obviously damaged in transit...Milwaukee support is very helpful and easy to deal with. I've already placed another order directly with Milwaukee and it arrived flawlessly. Won't be using Amazon as a middle man any longer. The device itself is great though, a very valuable tool on my reef tank

Works great and accurate. It triggers on or off a regular style wall plug that you can plug a dosing pump into to cycle on and off to adjust your ph up or down.