Milwaukee MC125 pH/ORP Controller with Mounting Kit, 0.00 to 14.00 pH, +/-0.2 pH Accuracy

First one arrived dead (unit would not even power on) but I returned it to Amazon and they sent out a replacement quickly. This new unit works great! It came with the necessary callibration packets (4 and 7) and was very easy to get set up. I run this unit 24/7 and have not had any problems for the past two months. It keeps my fish tank CO2 injector running perfectly and puts my mind at ease regarding overdosing.

I got the item a few days earlier then expected.I bought it for my swimming pool.The installation was simple. I made it exactly as required.The pH sensor is out from range and cannot be calibrated with buffer 7pH and also cannot be calibrated with buffer 4 pH. The adjustment screw-thread finished before I can reach value 7 or 4 in calibration process. I made as best as calibration screw- thread allow me, and compared to calibrated HACH pH meter. The difference was between 1.6 to 0.85 pH unit.The ORP sensor should not be calibrated, so I compared it to HACH mesurment and to standard +400 my ORP calibration solution. The MC125 show +246mv.The difference was 154 my less.I would not recommend to buy this instrument

I bought this in May 2014 for my reef tank and used it with my calcium reactor for a couple years. Now I just have it monitor pH. I calibrate the probe every 6 months but rarely had to make adjustment. Tank pH is measured weekly with an Oakton Eco Testr pH2, which is calibrated monthly with 4.0, 7.0 & 10.0 solutions, and readings always match. It's been almost three years and still working great.

THIS IS A VERY GOOD CONTOLER AND IT IS NOT MY FIRST ONE. THERE ARE BETER CONTRILERS AVALABLE BUT FOR THE MONNEY THIS GIVES YOU THE MOST BANG FOR THE BUCK.IT NEED' S ONE MORE DIGIT ON THE DISPLAY FOR ME TO GIVE IT FIVE STARS.

Excelente producto

Prior to buying this controller I had owned a prior version of it that worked fine for about two and half years (6 months beyond the warranty) before it failed. I called the manufacture, and found out these things are not repairable. If they fail beyond the 2 years, you throw them out and buy another one. The service rep I spoke with couldn't tell me if the new version is made with any different components then the last one I had that might make it last longer. So I have no reason to think this unit is built any better then the prior model (basically just different shape and color). If there was a reasonably priced alternative available, I probably would have given a different brand a shot. But otherwise, its accurate and easy to set up and use. Hopefully this one lasts a little longer.

everyone should have one of these in their fish room or corner...Awesome product!!!...well worth the money.

I live in Costa Rica and just got home with the unit (had it shipped to our USA address) and the unit doesn't work. Will not turn on. I think they keep sending these bad units out. I am very disappointed with the quality of these units. Now I have to pay as much as I paid for the unit for shipping to get a replacement. I should have checked it before I came home. Very disappointed