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. 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.
- 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
- 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.
Backscattering sensitivity 700 nm1
1E-06 m-1 sr -1
Backscattering range700 nm1
0–0.04 m-1 sr -1
0.009 ppb QSDE
0.009–900 ppb QSDE
Oil limit of detectionm3
< 80ppb crude oil
3 ppb crude oil
Temperature range of calibration2
-2 to 38 °C
Storage temperature range
-20 to 50 °C
75.7 mm (2.980”)
57.6 mm (2.268”)
Weight in air (approx.)
Pressure housing material
Digital output resolution
4 Wire Bulkhead
Current, typical (@7V)
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
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.
What should I use to lubricate bulkhead connectors?
WET Labs recommends keeping the connectors on your meter lubricated using a good quality silicone spray lubricant, such as 3M Silicone Spray or Loctite 8021 spray. These can be purchased at your local hardware store. Avoid silicone grease. It is messy and attracts contaminants.
Do not use WD-40. It will destroy connectors.