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for surface waters
FL24 fluorometer
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ABS head

ABS head: 
400 g lighter than inox

Flow-through downhole field fluorometers

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 (0.01°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.

Click here for comparing dataloggers.

The surface sonde (FL30) is preferred for its better stability in turbidity measurement and ease of use if the diameter is not a concern.

 See available dye tracers

Number of optics
Turbidity measurement 0.2 to 100 NTU
Detection limit 2 x 10-11 g/ml typical (uranine)
Measuring interval 9 sampling rates from 2 sec up to 20 min
Recording time several weeks
Memory capacity 2 GB
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
Integrated thermometer sensitivity: 0.01°C

Speleo kit

Special "speleo" design for less weight : 
FL24 fluorometer with ABS head, datalogger model III
Total weight :   2,8 kg without battery + weight of cable:  80 g per m

Albillia  Co
Rue des Epancheurs 34b
CH-2012 Auvernier
T +41 76 570 71 75