Extech 601100 Flat Surface Electrode 15 by 106mm

I did not expect much from taking a laboratory probe and putting it into a chlorine based commercial pool controller flow cell. So far so good. Have had it for about 1.5 months and it is still working good, which exceeded my expected life expectancy for it.(the ones I am supposed to use were on back order when I bought this as an interim temporary fill in)

It is not shown as in picture. It has a 4 pin connector that works with an Extech 220 C. I needed a standard 1 pi connecter that works with an Extech Oyster 10. Be careful before you buy.

My PH meter at work was giving inaccurate readings. I found the exact replacement for my extec 300. It arrived very quick and was a perfect fit. Very easy to calibrate and gives very accurate readings. I am very pleased with my purchase!

Thank you

I received this probe two months ago and it’s worked flawlessly. I use it often and it’s still at 90%.

I had to return the first one since it wouldn't calibrate. The second was better, but registered about about .1 high.

this ph probe works out of the box, accurate, I knocked a star off for a bit short of a cord but that may fit your setup better anyway, less cord to deal with. Its been working well for 2 months now.

So far so good. Awesome for price. Ibuseba blue lab multi style pH and tds combo (not the guardian ) calibrated fine. If this outlasts bluelab I will never go back to them again. I think I used to get about one and a half to two years out of blue lab.