ATI’s Q46N Dissolved Ammonia Monitor is a completely new approach to on-line continuous monitoring of ammonia that is far less expensive, and much simpler than conventional monitoring equipment. It is used in wastewater treatment, potable water treatment, river and stream water quality and refrigeration cooler applications. The Q46N Dissolved Ammonia Monitor uses reaction chemistry that converts ammonia in solution to a stable monochloramine compound equivalent in concentration to the original ammonia level. The chloramine concentration is then measured with a unique amperometric sensor that responds linearly to chloramines, while eliminating interference from excess free chlorine in a solution.