Nitrite may be determined using on-line instrumentation or by using portable/laboratory water analysis. Continual on-line nitrite measurement may be performed as part of a total nitrogen balance for waste water monitoring or within the process control of drinking water, to ensure compliance to the drinking water directive.
The TriOS OPUS probe technology uses UV spectral analysis to define the nitrite and nitrate concentrations. The sensor may be mounted directly into the basin or in to a small tank receiving a pumped sample. Automatic compressed air cleaning may be integrated to maintain the optical windows from fouling.