MilwaukeeInstruments MA911B/2 Double Junction Ph Electrode with 2 m Cable and Gel Filled Electrolyte Solution

Worked as a great replacement for the probe on my MW102. Easy to use, quick readings, and calibrates reliably. For some reason buying the unit with the longer cable is cheaper than the normal MW102 units.

Great replacement, took 3 years to kill my original

I tried a cheaper probe that was a waste of money. This probe works as expected. I will purchase it again.

Very accurate probe! I love the smooth finish and minimal design. This was a perfect replacement for the junk probes that Neptune gives with the apex. I am using this for a calcium reactor and so far very impressed for the money! I've used alot of probes over the years but this one stands out as superior. Typically cheaper is bad but in this case Milwaukee delivers a superior product at a damn good price!

Haven’t used yet

The probe is a great replacement for the bluelab's brand or for a general replacement, especially Milwaukee's probe is cheaper. Milwaukee's probe seems to be made a bit better too. I have bought a new probe from bluelab and it was defective thinking it was my monitor. They wouldn't even take a return on it. For the price and knowing Amazon will accept returns for something that could be defetive, I had to try this probe. The probe also comes with a sealed tube with storage solution. I calibrated the probe with no problem. As long you know how to calibrate the probe properly and have ph 7 and p4. You are good to go. It has been a week and my ph levels seems to be accurate still.

I had to replace an Atlas Scientific Consumer Grade pH probe that had readings drifting (even after multiple re-calibrations) after less than 1 year.... scanned Amazon and this item popped up. Based on other reviews I went for it. Looks relatively rugged ( for this type of instrument and cost. ) Reading "snapped" in SURPRISINGLY fast and stabilized very quickly (compared to other "cheap" probes I have) even on big pH swings. I have it connect to an Atlas Scientific EZO™ pH Circuit on an Electrically Isolated EZO™ Carrier Board via BNC->SMA adapter. I did a 3 point calibration and I'm back in action! Depending on how it performs over time I'm planning on picking up a spare for the shelf at this point. Will update if there are any major issues or setbacks.

I should have took warning to the comments I did see someone also received a used probe. I bought one and took it for granted I too received a used probe. It's also not described as pictured it shows the same model number but can be misleading. Anyway 2 stars for sending a used one. I am going through the replacement process if I get another used I will return to get my money back instead. 4-26-25 I'll update if I do end up in the same situation.