Aqualog underwater profiler - Oceanographic sensors integrated on the profiler

Oceanographic sensors integrated on the profiler

To configure the Aqualog Profiler at the factory it is required that a prospective client specifies several oceanographic sensors from the list below. This information is needed to provide complete set of the instrument fittings and the underwater cables. A client often tends to choose the sensors, which were obtained earlier to extend their services during a profiler survey.

Salinity, temperature and depth:

TRDI Citadel CTD ES
RBR XR-620 CTD
SBE 19 CTD
SBE 19plus V1,V2 CTD
SBE 49 CTD
SBE 52 MP CTD
Idronaut Ocean Seven 316plus CTD

Dissolved oxygen:

AANDERAA fast oxygen optode 4330F
SBE 43F sensor (with SBE 52 MP CTD or SBE 19plus CTD)
Idronaut Dissolved Oxygen Sensor (with Ocean Seven 316plus CTD)

Acidification and redox:

SBE 27 pH/Redox sensor
Idronaut pH sensor (with Ocean Seven 316plus CTD)
Idronaut ORP sensor (with Ocean Seven 316plus CTD)
Satlantic SeaFET pH sensor

Fluorescence and turbidity:

Seapoint Turbidity Meter & Fluorometers (Chlorophyll, Fluorescein, Rhodamine, UV)
Wet Lab FLBBCD Triplet for chlorophyll, backscatter, CDOM
Turner SCUFA fluorometer

Ocean current and acoustic backscatter:

Nortek Aquadopp current meter
RDI Doppler Volume Sampler (DVS)
AQUAScat1000 acoustic backscatter meter

Biochemistry:

Satlantic SUNA Deep Wiper nitrate sensor
SubChem APNA inorganic nitrate, phosphate, silicate, Fe(II) probe

*Other sensors can be integrated on request

Samples of the sensors placing

SBE 52 MP CTD, Oxygen SBE 43F sensor, SBE 27 pH/Redox sensor, Wet Lab FLBBCD Triplet
for chlorophyll, backscatter, CDOM sensor, Satlantic SUNA Deep Wiper nitrate sensor,
Evologics S2CR 7/17 modem

The Aqualog Profiler equipped with SBE 52 MP CTD, Seapoint Fluorometer, Nortek Aquadopp current meter,
and AquaSCAT1000 4-channel acoustic backscatter meter
(Photo courtesy David Luquet, Laboratoire d'Oc?anographie de Villefranche)

Application of the AQUAscat 1000s Acoustic Backscatter System on the profiler (jointly with University of Leicester, UK)


Sediments	Typically 20 ?m to 2000 ?m radius Typically 0.01 g/l to 20 g/l over 1 m
Measurement cells	256 х 40 mm ? 10 m
Measurement burst interval	Internally generated once every minute

The AQUAscat transmits pulses of high frequency sound on 4 transducers, each of which may operate at a different frequency in the range from 500 kHz to 5 MHz. It measures the sound scattered by sediment or other suspended materials at discrete spatial intervals programmable from around 2? millimetres to several centimetres.