Nitrate – nitrite – COD – BOD TriOS

TriOS spectral UV sensor for nitrate and nitrite, and other components

OPUS is the new generation of spectral sensors for the online measurement of nitrogen and carbon compounds. Full spectrum analysis enables the OPUS to provide reliable measurements for NO3-N, NO2-N, organic ingredients (CODeq, BODeq, DOCeq, TOCeq) and a number of other parameters. Nitrate measurement is important on water treatment. We can adjust the path length of this sensor. This allows the nitrate, nitrite measuring range and detection limit to be adjusted. The system can work independently, but also via one of our transmitters. Optionally there is also the Nico from TriOS for only 1 parameter such as Nitrate or Nitrite.

Main important features and benefits of this nitrate – Nitrite sensor:

  • The System is available as an immersion sensor
  • The Sensor can also be placed in a flow-through housing
  • Many parameters such as Nitrate NO3-N, Nitrite NO2-N, COD, BOD and some specific parameters
  • The Opus sensor is not only for Nitrate, but measures several parameters simultaneously
  • Ideally suited for dirty wastewater at WWTP
  • All measurements are continuously on-line
  • Many connection options such as bus, 4-20mA or WiFi
  • as Nitrate measurement widely used at WWTP
  • Robust and reliable

What can we do for you?

  • It is possible to install and commission the measurement for you
  • Do the maintenance for you
  • We can help you with a question
  • We can supply you with spare parts

View our other parameters for water: pHconductivityTurbidityDissolved oxygene

Website TriOS


256 channels spectral - 200 - 360nm

IP Rating
Power Suppy
12-24 VDC
Analog outputs
Active, 0/4 ... 20mA; via transmitter
Digital outputs
Depending on range
via tribox to 6 signals