OCEAN SEVEN 320Plus WOCE-CTD

FAST SAMPLING RATE: 40Hz, PROFILER AND RECORDER EQUIPMENT, ARCTICA, ANTARCTICA, FERRYBOX, BRINE

The OCEAN SEVEN 320Plus WOCE-CTD multiparameter probe is the result of Idronaut’s 35-year-old experience in the design and manufacturing of high-quality fast response CTDs for oceanography. The OCEAN SEVEN 320Plus CTD well meets the WOCE programme accuracy, precision and resolution specifications.

IDRONAUT

BRUGHERIO (MB), IT

Description

The CTD can be easily equipped with an additional redundant conductivity and temperature (CT) sensor pair without the need for underwater connectors. The CT redundant sensors permit the gathering of extremely precise data with a verifiable data quality. The OCEAN SEVEN 320Plus WOCE-CTD is equipped with the well-known IDRONAUT full ocean depth, pump-free and long-term stability sensors. Central to which, is the high accuracy seven-platinum-ring quartz conductivity cell (patented), which can be cleaned in the field without the need for re-calibration. This unique quartz cell employs a large diameter (8 mm) and a short length (46 mm) to guarantee self-flushing and no clogging after long-term deployment even in biologically active waters. Competitors' sensors, which present few mm only of cell orifice and very long cell length, are prone to clog even if protected by dangerous and poisonous antifouling devices. The OCEAN SEVEN 320Plus WOCE-CTD multiparameter probe does not require pumps or any other external device to flush the sensors, which minimizes its power consumption and allows the use in Arctica and Antarctica. However, pump is optional. Data telemetry available for on-line full ocean depth real-time data transmission. Other interfaces like RS422 and wireless Bluetooth® can be optionally installed. The OCEAN SEVEN 320Plus WOCE-CTD, because of an innovative 24-bit high-speed CT digitizer circuit, provides 40 Hz sampling rate. Furthermore, the highly precise pressure transducer enhances the pressure sensor accuracy/precision to 0.01 % Full Scale (FS). The OCEAN SEVEN 320Plus WOCE-CTD multiparameter probe can accommodate up to sixteen 16-bit sensor analogue inputs, which can be added at any time, making this Idronaut probe an investment for the future.

Specifications

General: Diameter [mm]

89

Housing Material

Titanium Ø 89 mm or POM Ø 100 mm

Length [mm]

720

Max. cable length [m]

10000

Weight in air [kg]

8

Year of initial development

2006

Operation Characteristics: Data display on dedicated hardware

Y

Method of first recording

Internal memory

Pressure, temperature and conductivity sensor: Accuracy of temperature measurement

0.001 °C

Accuracy of conductivity measurement

0.0001 S/m

Accuracy of pressure sensor

0.01% Full scale

Conductivity sensor

Y

Max. conductivity [S/m]

0

Max. temperature [°C]

45

Min. temperature [°C]

-5

Pressure sensor

Y

Resolution of pressure [% FS]

0

Resolution of conductivity [10^-3 S/m]

0

Resolution of temperature [°C]

0

Temperature sensor

Y

Type of conductivity sensor

7-rings quartz cell

Type of pressure sensor

Transducer

Type of temperature sensor

Pt100

Software specifications: CTD Probe controller

Y

Graphical presentation

Y

Re-computation with raw data

Y

Raw data editing

Y

Recording with third party software

N

Software name

WTERM and REDAS-5

Environmental: Max. depth [m]

7000

Max. pressure [bar]

700

Operating temperature: min. [°C]

-5

Operating temperature: max. [°C]

50

Data and connectivity: Connectors

RS232

Dedicated sub-surface data logger

N

Dedicated surface data logger

N

Direct data reading

Y

External recorder required

N

Internal memory

Y

Internal Memory [MB]

4000

Max. number of samples for self-recording [10^3]

16000

Telemetry link to remote location

Y

Type of internal memory

SD card

Power: Battery

optional

Battery type

Nickel-Metal Hydride

Battery duration [hr]

20

Max. operating power [V]

30

Min. operating power [V]

9

Additonal sensors: Description of additional sensors

Turbidity Meter, Fluorometers, PAR, Rosette water sampler, Altimeter, Transmissometer etc..

No. of additional sensors

10

Standard sensor

Conductivity; Temperature; Pressure, Oxygen, pH, Redox (ORP)