The Seapoint
Ultraviolet Fluorometer (SUVF) is a high-performance, low
power instrument for in situ measurement of chromophoric
dissolved organic matter (CDOM). 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 measure CDOM in a wide variety of conditions. The SUVF
uses modulated ultraviolet LED lamps and excitation
filter to excite CDOM. The fluorescent light emitted by
the CDOM passes through a blue emission filter and is
detected by a silicon photodiode. The low level signal is
then
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processed
using synchronous demodulation circuitry which generates
an output voltage proportional to CDOM concentration. 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. |
