Randy, I need to purchase a replacement electrode for a pH analyzer that I'm using. There is an option for these sensors that I am unfamiliar with, 'Solution Ground'. Do you know if this is a ground for the entire system or is it just for the analyzer and sensor? If I already have a ground probe in the system, will this cause a ground loop? I don't know if this option is really necessary. Have you ever used these kind of industrial sensors?