PH Probe options

Oceanwolf · Jan 17, 2023

I have a FOWLR and an APEX EL. The PH probe that came with does not calibrate. I do manual Ph checks time to time, the PH probe is just for checking the trends. As replacement probe, I looked at BRS, Neptune probes and someone in R2R said Pinpoint is good so I bought that. While I was searching I noticed a bunch of AlibabaExpress lab grade probes. The prices are about $8-10 and the shortfalls are long shipping times and short cable lengths. I can order one and check it out, but anyone tried them?

ndrwater · Jan 17, 2023

Do it and let us all in the reefing community know.
I know I just had to replace a couple double junction lab grade probes and was NOT happy with the cost
Another option would be terrific

JeffB418 · Jan 17, 2023

I personally spend the extra money and grab lab grade units from atlas scientific. They are close to $100 shipped but I have never had an issue with the 5-6 units I have bought. They have lasted longer than other probes and hold cal very well. Worth the money.

Oceanwolf · Jan 17, 2023

JeffB418 said:
I personally spend the extra money and grab lab grade units from atlas scientific. They are close to $100 shipped but I have never had an issue with the 5-6 units I have bought. They have lasted longer than other probes and hold cal very well. Worth the money.

I would totally agree with you if these probes were manufactured in the US. But if they’re also from China, it is just a brand issue. For example, I just received 2 Optical water level sensors which exactly looks like Neptune ones for $1.5 each. I need to replace the cable but if they work out, they would be replacing $30 sensors. I also bought ¼” flow sensors, I will try them out too with my FMM. If they work out, I would buy more of them and another FMM.