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SeaOWL UV-A™ SLC (Sea Oil-in-Water™ Locator SLC)

The Sea-Bird Scientific SeaOWL UV-A™ SLC introduces a new in-situ oil-in-water sensor specifically designed for integration into the Teledyne Webb Research Slocom glider.

The Sea-Bird Scientific SeaOWL UV-A™ SLC introduces a new in-situ oil-in-water sensor specifically designed for integration into the Teledyne Webb Research Slocom glider. Based upon the highly successful WET Labs’ ECO sensor, Sea-Bird Scientific has developed an industry leading detection technology creating a 5X optical resolution improvement over its predecessor.

SeaOWL UV-A™ SLC measures crude oil-in-water using the same UV-A excitation and blue emission wavelengths (370 nm EX/ 460 nm EM) currently used in the ECO CDOM fluorometer. The SeaOWL UV-A™ SLC improves the resolution and range of the ECO with a greater depth of field, optimized electronics and dynamic gain stage modulation. The new dynamic gain provides industry leading sensitivity across a large detection range making saturation unlikely in even the most heavily impacted environments. The compact SeaOWL UV-A™ SLC design also includes chlorophyll fluorescence and 700 nm backscattering measurements to discriminate crude oil from phytoplankton and other natural sources of FDOM.

Features

  • Industry leading optical resolution.
  • Wide dynamic gain prevents measurement saturation even within heavily impacted environments.
  • Three parameters in a single sensor: chlorophyll, backscattering, and Fluorescent Dissolved Organic Matter
  • (FDOM).
  • Backscattering and chlorophyll fluorescence provide discrimination of crude oil from phytoplankton and other
  • natural sources of FDOM.

See also our SeaOWL UV-A™ page for the non Slocum Glider version.

 

 

Optical

Backscattering wavelength

700 nm

Backscattering sensitivity 700 nm1

1E-06 m-1 sr -1

Backscattering range700 nm1

0–0.04 m-1 sr -1

Chlorophyll EX/EM

470/690 nm

Chlorophyll sensitivity

0.003 µg/l

Chlorophyll range

0.003–250 µg/l

FDOM EX/EM

370/460 nm

FDOM sensitivity

0.009 ppb QSDE

FDOM range

0.009–900 ppb QSDE

Oil Calibration

 

Oil limit of detectionm3

< 80ppb crude oil

Oil sensitivity4

3 ppb crude oil

 

Environmental

Temperature range of calibration2

-2 to 38 °C

Storage temperature range

-20 to 50 °C

Depth rating

1000 m

 

Mechanical

Diameter

75.7 mm (2.980”)

Length

57.6 mm (2.268”)

Weight in air (approx.)

399 g

Displacement

128 mL

Pressure housing material

Aluminum 6061-T6

 

Electrical

Digital output resolution

14 bit

Communication

RS-232

Sample rate

1 Hz

Connector style

4 Wire Bulkhead

Input voltage

7–15 volts

Current, typical (@7V)

81 mA

1Backscattering specifications are derived from a vicarious calibration with an MCOMS backscattering sensor. Scale factors for
backscattering incorporate the target weighting function and the solid angle subtended for the MCOMS optical backscattering
sensor. The SeaOWL UV-ATM SLC is highly linear in response to changes in the particle concentration of a specific particle
p opulation.
2The temperature range through which the instruments are tested for operation. The -2° C minimum covers all natural waters on
E arth. Please contact Sea-Bird Scientific for testing to higher temperatures.

3The estimated limit of detection (LOD) for the ECO CDOM fluorometer is <300 ppb cruide oil (Conmy et al., 2014), i.e. 30
counts. Using the same count to LOD relationship, LOD for SeaOWL UV-A SLC was derived.

4Appling the ECO CDOM fluorometer crude oil calibration from Conmy et al., 2014, yields this scale factor.

The list below includes (as applicable) the current product brochure, manual, and quick guide; software manual(s); and application notes.