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0823 1173 8960 (Fajar)

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+62-21 29563045







Optical Nitrate Sensor

Optical Nitrate Sensor



Order

Description

Sea-Bird Coastal SUNA Optical Nitrate Sensor

High accuracy in-situ nitrate measurement

With improved optics and built-in adaptive sampling intelligence, the SUNA V2 measures nitrate with industry-leading accuracy and stability over a wide range of environmental conditions. The wide range of optional features offered for the SUNA V2 make the sensor a cost-effective choice for routine nitrate measurements.

  • Attended, Unattended
  • Nitrate
  • High-accuracy, chemical-free, in-situ nitrate measurement
  • Interface: SDI-12, RS-232, 4 – 20 mA

Feature

  • Optional: reduced 5mm pathlength for improved performance during high flow/high turbidity storm events
  • Adaptive sampling logic automatically tunes the optical operations to real-time environmental conditions for high CDOM applications
  • Active fouling control with fully integrated biowiper, ensuring accurate and stable long-term data sets, reducing the need for site visits
  • Advanced processing algorithms, using the full UV spectrum for maximum accuracy across the entire sensing range

Spesification

1.1 Mechanical

  SUNA with Wiper
Material Titanium
Rated Depth 100 m
Weight (in air) 5.1 kg
Pathlength 10 mm or 5 mm
Length 588 mm/ 583 mm
Diameter 63 mm
Temp Range, Operation -2 – 35 C
Temp Range, Storage -20 – 50 C

1.2 Electrical

Input 8 – 18 VDC
Input, Sensor with Wiper 8 – 15 VDC
Current Draw, Operation ~ 625 mA at 12V
Current Draw, Standby ~ 20 mA at 12V
Light Source UV Deuterium Lamp (900 hr lifetime)
Communication Interface RS232; Analog 4 – 20 mA; (USB, SDI-12 optional)
Data Storage 2GB (optional)

1.3 Optical

Spectral Range 190-370 nm
Pathlength 10 mm (5 mm optional)

1.4 Analytical

1.4.1 Nitrate Measurement Accuracy

Concentration        Range 10 mm 5 mm
  Sensor Specific Class Based Sensor Specific Class Based
up to 14 mg N/L 0.028 mg N/L or 10% 0.035 mg N/L or 20% 0.056 mg N/L or 10% 0.063 mg N/L or 20%
up to 28 mg N/L 0.028 mg N/L or 15% 0.035 mg N/L or 25% 0.056 mg N/L or 15% 0.063 mg N/L or 25%
up to 42 mg N/L 0.028 mg N/L or 20% 0.035 mg N/L or 30% 0.056 mg N/L or 15% 0.063 mg N/L or 25%
up to 56 mg N/L out of range 0.056 mg N/L or 15% 0.063 mg N/L or 25%

* A sensor specific calibration uses extinction coefficients from the sensor itself

* A class based calibration uses extinction coefficients that are the averager of many sensors

1.4.2 Nitrate Measurement Precision

Processing Configuration Seawater or Freshwater with T-S Correction Seawater (0-40PSU)
Short-term precision (3 sigma) 0.004 mg N/L 0.034 mg N/L
Change (“drift”) per hr of lamp time  

1.4.3 Limit of Detection and Limit of Quantification

Processing Configuration Seawater or Freshwater with T-S Correction Seawater (0-40 PSU)
Limit of Detection 0.004 mg N/L 0.034 mg N/L
Limit of Quantification 0.014 mg N/L 0.112 mg N/L