Diameter 48 mm Height 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. Model FL24 has quadruple excitation and detection axes, allowing simultaneous use of three tracers and independent turbidity measurement.
The sonde connects with a 4-wire signal 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 (0.01degree 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.

ABS head: 400 g lighter than inox

Number of optics:4
Turbidity measurement :0.2 to 100 NTU
Detection limit:2 x 10-11 g/ml typical (uranine)
Recording time :several weeks
Number of storage pieces: 100000 pieces
Serial output for PC :RS232 (or USB with adaptor cable) or USB with new logger
Power supply (lead battery): 6 to 12 Volt
Battery capacity: 12 to 24 Ah (1 or 2 batteries)
Stand-by consumption :< 1 mA
Analog-digital conversion: 24 bit unipolar
Connections :cable (30 m or more) weight: 0.800 kg/10m
Sonde casing: stainless steel: 2.1 kg. Only 1.6 kg with ABS head
Battery box (datalogger) :waterproof, weight: 7.9 kg with 2 batteries 6V12Ah

Detectable fluorescent tracer type :
Classe I:
.Uranine (fluoresc閕ne sodique)
.Eosine
.Pyranine

Classe II:
.Amidorhodamine G
.Rhodamine WT
.Sulforhodamine B

Classe III:
.Tinopal (CBS-X ou -CL)
.Amino G acide
.Photine

Classe IV:
.Duasyne jaune T

Classe V:
.Naphtionate de Na