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Seapoint Ultraviolet Fluorometer
Download pdf Datasheet or User Manual

  FEATURES
Very low power requirements
Can be used in pumped or open deployments
Small size
6000 m depth capability
Good ambient light rejection
Linear output
Four programmable ranges
Low temperature coefficient
Low offset voltage does not require adjustment
Pin compatible with other Seapoint sensors
Interfaces easily with data acquisition systems
Rugged, corrosion-free materials

APPLICATIONS
Ocean color research
Water and Wastewater quality
DOM cycle studies 
Radiative transfer studies
Ocean Science and Research
Limnological Studies
Crude oil detection
Dye detection

Seapoint Ultraviolet Fluorometer Top View
 
Seapoint Ultraviolet Fluorometer


DESCRIPTION
The Seapoint Ultraviolet Fluorometer (SUVF) is a high-performance, low power instrument for in situ measurement of fluorescent materials including chromophoric dissolved organic matter (CDOM), crude oil, and UV fluorescent dyes. Its small size, very low power consumption, high sensitivity, wide dynamic range, 6000 meter depth capability, and open or pump-through sample volume options provide the power and flexibility to operate in a wide variety of conditions. The SUVF uses modulated ultraviolet LED lamps and optical filter for excitation. The fluorescent light signal passes through a blue emission filter and is detected by a silicon photodiode. The low level signal is then processed using synchronous demodulation circuitry which generates an output voltage proportional to the amount of fluorescent light received. The SUVF may be operated with or without a pump. The sensing volume may be left open to the surrounding water, or, with the use of the supplied cap, can have water pumped through it. Two control lines allow the user to set the range to one of four options. These lines may be hardwired or microprocessor controlled to provide a suitable range and resolution for a given application. The sensor is easily interfaced with data acquisition packages; a 5 ft. pigtail is supplied. Custom configurations are available. 

 
 
SPECIFICATIONS

Power Requirements:
Output
Output Time Constant
Power-up Transient Period
Excitation Wavelength
Emission Wavelength
Sensing Volume
Minimum Detectable Level

 
Sensitivity/Range
   (Quinine Sulfate)


 


Depth Capability
Weight (dry)
Operating Temperature
Material
Underwater Connector


8.5-20 VDC, 15mA avg., 27mA pk.
0-5.0 VDC
0.1 sec.
< 1 sec.
3
70 nm CWL, 12 nm FWHM
440
nm CWL, 40 nm FWHM
340 cu.mm

0.05 g/l (Quinine Sulfate)
 
Gain
30x
10x
3x

1x
Sensitivity, mV/g/l
100
33
10
3.3
Range, g/l
50
150
500
1500


6000 m (19,685 ft)
1000 g (2.2 lbs)
0C to 65C (32F to 149F)
Rigid polyurethane
Impulse AG-306/206 (others available on request)

 
DIMENSIONS
Schematic of Seapoint Ultraviolet Fluorometer   

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