Flow-through downhole field fluorometers
Diameter 48 mm Height 236/270 mm Usage: tracing experiments in 2" boreholes tested to
depths of 70 metres. No mechanical parts, no wear. Can be used as well with quick-connect
fittings and 6 mm tubings. Double excitation - double detection allows measurements of 1 tracer
Models have quadruple excitation and detection axes, allowing simultaneous use of three
tracers and independent turbidity measurement. The sonde connects with a 4-wire signa
l cable to a waterproof box hosting a datalogger and 1 or 2 batteries.
The datalogger provides power, timing, clock and data storage capability. The signal is
transmitted in digital form. The box can connect to any PC through the RS232 interface.
For unattended work, the datalogger stores as many as 4 x 60,000 samples and water
temperature (0.01°C accuracy) on a Compact Flash card.A recent datalogger version
features following advantages: LCD display on 2x16 characters, USB interface instead
of RS232, microSD card instead of CF, and optional GPRS modem for remote data
access through the web.
The surface sonde (FL30) is preferred for its better stability in turbidity measurement
and ease of use if the diameter is not a concern.