BOREHOLE CTD OCEAN SEVEN 310

43 mm Diameter GROUND WATER MULTI-PARAMETER PROFILER

The BOREHOLE multiparameter CTD OCEAN SEVEN 310 is the result of IDROANUT's 40-year-old experience in the design and manufacturing of high-technology borehole probes for deep groundwater profiling. The OS310 CTD multiparameter probe, which presents very small size (diameter of only 43mm), has been specifically designed for groundwater investigations through "boreholes" and uses very reliable, accurate and drift-free high-quality sensors, associated with advanced and miniaturized electronics. Thanks to the adoption of a new generation of electronic devices, the OS310 can guarantee sampling rates up to 28Hz, with long-term sensor stability, making this probe the best choice for profiling applications. The OS310 CTD can be easily integrated/adapted to third-party systems like external data logger. The OS310 multiparameter CTD does not require pumps or any other external device to flush the sensors and continuously transmits acquired data converted into engineering units via telemetry. The OS310 CTD allows the operator to select the proper conductivity range for salt or fresh water, making this probe a very advanced tool for investigation of ground-water influenced by salt-water intrusion.

IDRONAUT

BRUGHERIO (MB), IT

Description

CONDUCTIVITY CELL

The high accuracy seven platinum ring quartz conductivity cell (patented) can be cleaned in the field without the need for recalibration. This unique quartz cell employs a large diameter (8mm) and a short length (46mm) to guarantee self-flushing and no clogging after long-term deployment even in biologically active waters.

TEMPERATURE SENSOR

Features a very fast platinum resistance thermometer (response time: 50 ms). Negligible self-heating effect.

DATA TELEMETRY

The telemetry interface allows interfacing the OS310 through standard oceanographic coaxial cables up to 10Km long. When communicating through data telemetry, the IDRONAUT deck unit is mandatory. The OS310 can use both the low-voltage (30/60 VDC) Portable deck unit and the high-voltage (220 VDC) on-board MkPlus deck unit.

TELEMETRY PORTABLE DECK UNIT

The Telemetry Portable Deck Unit powers and interfaces, by coaxial oceanographic cables, the OCEAN SEVEN 310 multiparameter CTD with a personal computer. The portable deck unit is equipped with a transceiver (modem) which allows communication with the probe. The portable deck unit is housed in a waterproof plastic case and is provided with an internal mains rechargeable lead battery (12VDC, 7A/h) which permits probe operation in the absence of the mains supply.

The internal battery guarantees up to 20 hours of continuous probe and deck unit operation.

The portable deck unit comes complete with an international battery charger.

Telemetry power supply: 30/60 VDC (max 0.3A@12V).

Dimensions: 340 x 300 x 160 mm. Weight: 6.5 kg.

Specifications

General: Diameter [mm]

43

Housing Material

AISI316L or Titanium

Length [mm]

500

Max. cable length [m]

10000

Weight in air [kg]

1

Year of initial development

2005

Operation Characteristics: Data display on dedicated hardware

Y

Pressure, temperature and conductivity sensor: Accuracy of temperature measurement

0.0015°C

Accuracy of conductivity measurement

0.00015 S/m

Accuracy of pressure sensor

0.05%FS or 0.01%FS

Conductivity sensor

Y

Max. conductivity [S/m]

9

Max. temperature [°C]

50

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

Y

Software name

WTERM and REDAS-5

Environmental: Max. depth [m]

3000

Max. pressure [bar]

300

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]

250000

Telemetry link to remote location

Y

Type of internal memory

SD card

Power: Battery

optional

Additonal sensors: Description of additional sensors

Oxygen, pH, Redox (ORP)

No. of additional sensors

3

Standard sensor

Conductivity; Temperature; Pressure,