Milwaukee Instruments MA913B/3 pH Probe Double Junction with Kcl Gel Filled, Bnc

Seems to be accurate, will test the calibration in a month and see if it has drifted

Wonderful product

Needs constant calibration doesn’t hold calibration to well. Waste of money been calibrating it almost every month now

Good quality, but it sucks that you have to replace these every couple of years.

Works fine. No calibration needed.

The solution leaked out, packaging could have been better. Not sure if I even want to try to use it at this point.

Compatible with Neptune Apex. Seemsto work well enough. It falls off on calibration more frequently than the Neptune version for some reason. I have to recalibrate every 4-6 weeks which is fine but a little annoying.

I bought this because it was cheap and had descent reviews. Don’t waste your money just spend the money and get a better one. You get what you pay for. Failed in a little over a month. I use this in my reef tank and it scared the crap out of me, my ph started dropping drastically all of the sudden and I thought my tank was crashing. I took the ph probe out of my tank and it had this white substance coming out of the tip of it. Luckily I still have my old one that came with my apex put that one back in and ph is back to normal where it should be.