Dissolved Oxygen Control through measurement of Ammonium: ISE vs Wet Chemistry

A recent trial of the WTW VARiON Ammonia ISE against a competitor’s wet chemistry analyser on the inlet to a major ASP on a flagship works in the UK revealed just how far the ISE technology has come through the intensive investment in R&D that Xylem has made. 6 weeks of data is presented across the plots below.