TriOS NICO Nitrate Meter

TriOS NICO is a low-cost UV photometer for the continuous measurement of nitrate nitrogen (NO3-N) in water. It needs no chemical consumables or sample preparation and measures directly in the water by UV absorption. A xenon flash lamp and four photodiode detection channels give the measurement, taking turbidity and organic substances into account. Mikron Proses (Üsküdar, Istanbul), TriOS’s solution partner in Turkey, provides application consulting on sensor selection, commissioning and calibration.

Application consulting · Commissioning · Calibration → Send us your requirement

UV absorption method

Nitrate absorbs ultraviolet light strongly. NICO combines this physical principle with a xenon flash lamp and a detector with 4 photodiodes and filters. Because of the four detection channels, the nitrate value is determined by absorption while taking into account turbidity and organic substances. An internal temperature correction additionally increases the stability of the measured values.

• Without reagents: no chemical consumables are used.
• Measuring ranges: with a 1 mm optical path the range is 0.5-60 mg/L NO3-N; with a 10 mm optical path it is 0.05-6 mg/L NO3-N. Optical paths of 2 mm, 5 mm and 50 mm are also available.

Housing and installation

The sensor is supplied with a stainless steel (1.4571 / 1.4404) or titanium (3.7035) housing and has protection class IP68. The optical windows are nano-coated to reduce fouling.

Network connection

NICO has the TriOS G2 interface, which allows configuration with a web browser, and an internal data logger. It connects to third-party systems through Ethernet (TCP/IP) or RS-485 (Modbus RTU). For nitrate and organic parameters in one sensor, see the NICO plus UV photometer; for the measuring principle, see the nitrate sensor guide. All analyzers are listed under online analyzers.