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.
OPTIONAL FEATURES
- 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
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PERFORMANCE
| 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) |
| Accuracy |
± 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
OPTICS
| Path Length |
10 mm & 5 mm (high turbidity option) |
| Wavelength Range |
190-370 nm |
| Lamp Type |
Continuous Wave, Deuterium Lamp |
| Lamp Lifetime |
900 h |
ELECTRICAL
| Input Voltage |
8-18 VDC & 8-15 with Hydro-Wiper |
| Power Consumption |
7.5 W (0.625 A at 12 V) nominal |
MECHANICAL
| Material |
Acetal/ Titanium |
| Depth Rating |
500 m
100 m with Hydro-Wiper |
| Weight |
2.5 kg
3.1 kg with Hydro-Wiper |
| Displacement |
1749 cm3
2092 cm3 with Hydro-Wiper |
CALIBRATION
| Methods |
- Seawater
- Freshwater
- Class-based Freshwater
|
| Correction |
Real-Time temperature-salinity correction available* (0-35o C, 0-40 PSU)
* Requires external T/S data. |
DIMENSIONS
