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fluorometer for surface waters |
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fluorometer Downhole |
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Three
available data loggers for the FL24 and/or FL30 fluorometer probe
|
Please note that only one probe can be connected at a
time to the data logger. However a PC can
be used as data logger for several probes. For this, you need a USB to
multiple RS232 interface. Several instances of the FLUO program can run
and collect the data of several probes. |
1.
Data
logger with one 2GB-Compact
Flash card, no display, RS232 interface, sampling rate from 2 seconds
to 15
minutes plus external rate, and optics selection by rotating switches.
Waterproof casing in cast-Al or Pelican.
a.
Pros:
Small sensitivity to humidity,
small current consumption (one 12V 7Ah battery lasts several months),
easy
interface for PC with COM ports.
b.
Cons:
Rudimentary file system (only
one file on the CD), no LCD display, no GPRS option.
c.
Recommended
for: Long-lasting tracer tests, speleology
2.
Data
logger with Controlord Gigalog S microcontroller.
One microSD 2 GB-card. LCD display on 2x16 char. USB interface. Full
DOS file
system, sampling rate from 2 seconds to 15 minutes, and optics
selection by rotating
switches. Waterproof casing in cast-Al.
a.
Pros:
File system on modern flash
cards, display of mV and ppb data, GPRS option.
b.
Cons:
Requires strict humidity
control with desiccant bag (silicagel). Higher current consumption: one
12V 7Ah
battery for 3 to 4 weeks.
c.
Recommended
for: General use, stream
gauging
3.
Same as
(2) but the electronic
circuit is protected in a polyamid box with transparent lid for reading
the
LCD. This box is protected in a Peli case with one or 2 batteries. The
user is
not supposed to open the internal box. The content of the flash card is
downloaded in a few seconds through the USB interface. The rotating
switches
are replaced by 2 push buttons.
a.
Pros:
Better protection against
humidity and water damages
b.
Cons:
Needs a laptop for data
download
c.
Recommended
for: General use, stream
gauging, high condensing humidity.
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 Youtube: Fluorescent tracing dyes for environmental measures |