my Ph GA Ph probe has probably given up the ghost. I have read elsewhere

Hello, my Ph probe (GA Ph) has probably given up the ghost. I have also read that hydrochloric acid should not be used as a pH corrector - apart from my swimming pool specialist only has this product for sale, sulfuric acid would, according to him, be prohibited for sale to individuals. Is the probe a victim of this change of raw material (it's the first year that I use it)...?

Good morning

No, I do not think so .

To test your probe do this: https://ph-redox-pool.com/gb/content/16-ma-sonde-ph-est-elle-hors-service-

OK, on ​​the cable of my probe I have the reference 11715628 JUL 17.

Is your product identical to and compatible with my GA Ph regulator (it dates from 2011!!!!) and has worked perfectly until now...

Yes it is compatible

OK, I'm going to retest my probe but I think it's broken because I wanted to redo a calibration and after 3 tries I have the error message on the box even though I use single doses of Ph 7 and 10 control ......