Ammonia nitrogen is a common pollutant in industrial, agricultural, and domestic sewage. Ammonium nitrogen depletes dissolved oxygen in water bodies and leads to eutrophication. Ammonium ions are measured using the ion-selective method, which consists of a working electrode, a reference electrode, an ion-selective membrane, and an electrolyte. Only the ammonium ions to be measured can pass through the ion-selective membrane and undergo a charge change, generating a potential at the working electrode proportional to the ion concentration and a constant potential at the reference electrode. The controller is based on the Nernst equation, which measures the potential difference between the working and reference electrodes and converts it to the ammonia nitrogen concentration based on the potentiometric measurement principle, independent of coloration and turbidity.
It is suitable for online and portable monitoring of municipal sewage, domestic sewage, agricultural sewage, industrial sewage, process control, nitrification treatment, aeration tanks, etc. It is suitable for integrated applications such as buoy, floating discharge, and vessel monitoring.