APERA INSTRUMENTS 201DJ-C Double-Junction pH Electrode, BNC Connector, 3 Ft Cable, PC Body

Worked perfectly to replace the comparable unit on my Milwaukee ph tester.

I use these pH electrodes in a machine that produces chorine solution from splitting salt water with electricity. So the environment is definitely corrosive even for plastics (over time). Electrode has been performing way more stably then a different brand that I used to buy here on amazon. So I really vouch for these right now, at least for my application. I don't even expect these to last more then a few months since they are constantly dipped in the concentrate, and this one is performing great.

I'd say this is probably a really nice EC sensor, except the item description is for the PH probe. I'd love to try their PH probe, but I keep getting sent their EC sensor sent by mistake. Since the ph probe is double junction and made by Apera, I'd imagine it is an excellent choice. I hope to be able to review their PH probe soon.

very short life

Works as expected, quick response time and accurate readings. Great price for this probe.

Tengo tiempo usando este producto en mi empresa. Pero el último, me llegó malo. Lo cual me creo desconfianza. Espero q este esté bien y no de problemas

It came with a calibration certificate dated December 2024 (6 months ago). After a rinse with DI water and a dunk in pH7 calibration solution it read 5.5 and slowly ramped up to 8.5. Probe was rinsed repeatedly and put into the 7.0 calibration solution and the readings went to 6 and then climbed to over 8pH and would not stabilize. After trying pH 10 it started to stabilize ,but after rinsing in RO water and trying pH 7 buffer again the reading dropped to 2 and slowly climbed. I gave up and sent it back.

using in my fish tank and has failed...now just reading 6.72 no matter what I do and predictably right outside of return period.