The Seapoint
Rhodamine Fluorometer (SRF) is a high-performance, low
power instrument for in situ measurements of Rhodamine
WT. 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
Rhodamine WT in a wide variety of conditions. The SRF
uses modulated green LED lamps and a narrow-band
excitation filter to excite Rhodamine WT. The fluorescent
light emitted by the Rhodamine WT passes through an
orange 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 Rhodamine WT concentration. The SRF 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. |
