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Analyseur de nitrate submersible ultraviolet

  • Model: SUNA V2

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Product Description:
The new SUNA V2 UV nitrate sensor is the ultimate chemical-free solution for autonomous monitoring of nitrogen-based nutrient concentrations in ocean, estuarine and high turbidity freshwater environments.

The SUNA V2 (Submersible Ultraviolet Nitrate Analyzer) is a chemical-free UV nitrate sensor based on the ISUS (In Situ Ultraviolet Spectroscopy) UV nitrate measurement technology developed at MBARI. Satlantic has adapted the technology to develop the SUNA V2 to measure nitrate in increasingly more challenging environments including extremely turbid and high CDOM conditions. With improved optics and built-in logic intelligence, the SUNA V2 measures nitrate with industry leading accuracy and stability over a wide range of environmental conditions, from blue-ocean nitraclines to storm runoff in rivers and streams.

The SUNA V2 is the ultimate solution for real-time nutrient monitoring. Every SUNA V2 now comes with our proven universal real-time nitrate processing algorithm, which has been upgraded to include adaptive sampling intelligence that automatically adjusts for signal strength. Also included in every SUNA V2 is a 10 mm pathlength, a class based nitrate calibration, serial data output and a 500 meter depth rating.
In addition to these standard features, a wide range of optional features provide the ability to customize the instrument to meet your specific research and deployment needs.


  •  Reduced 5mm pathlength for high turbidity environments
  •  Active fouling control with fully integrated Hydro-Wiper
  •  Internal data logging and scheduling with 2 GB memory 
  •  Full Freshwater & seawater calibrations
  •  USB communications and data download
  •  SDI-12 interface


Limit of Detection
0.5 μM (FW or SW with T/S correction) 
2.0 μM (SW 0-40 psu)
Detection Range
3000 μM (10 mm path length)
4000 μM (5 mm path length)

± 2 μM (± 0.028 mg/I-N) or ± 10% of reading

Short-term precision (at 3σ)
0.3& μM (FW or SW with T/S correction)
2.4 μM (SW 0-40 psu)
Drift (per hour lamp time)
0.3 µM (FW or SW with T/S correction)
1.0 µM (SW 0-40 psu)

Turbidity range 



625 NTU* (10 mm path length; absent other absorbing species)
1250 NTU (5 mm path length; absent other absorbing species)

*Nephelometric Turbidity Units


Path Length10 mm & 5 mm (high turbidity option)
Wavelength Range190-370 nm
Lamp TypeContinuous Wave, Deuterium Lamp
Lamp Lifetime900 h


Input Voltage8-18 VDC & 8-15 with Hydro-Wiper
Power Consumption7.5 W (0.625 A at 12 V) nominal


Material Acetal/ Titanium
Depth Rating
500 m
100 m with Hydro-Wiper
2.5 kg
3.1 kg with Hydro-Wiper
1749 cm3
2092 cm3 with Hydro-Wiper


  • Seawater
  • Freshwater
  • Class-based Freshwater

Real-Time temperature-salinity correction available*  (0-35o C, 0-40 PSU)

* Requires external T/S data.