The Hach NO3D sc utilizes an ion-selective electrode to detect nitrate ions in the aeration basin as nitrate nitrogen. The new sensor is designed for immersion directly in the aeration basin, which eliminates the need for sample preparation.
Hach reports that the NO3D sc sensor installs quickly outdoors without a special housing and can easily be relocated to a variety of locations. The influence of chloride is compensated by using an integrated chloride electrode. The Hach CARTRICAL cartridge calibrates each electrode individually and all three electrodes to each other. A temperature sensor is also incorporated.
Hach also says their sensors arrive pre-calibrated and have fewer maintenance needs. Single membrane and electrolyte exchange are not necessary as they are integrated into a sensor cartridge. The CARTICAL sensor cartridge is the only replacement part, and should be replaced about twice a year.
